{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852787,"usec":627975},"freq":136975000,"burst_len_octets":142,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.259700,"noise_level":-14.891076,"freq_skew":2.596780,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":false,"pdu_type":28,"pdu_type_name":"Data","src_nsap":[71,0,39,65,68,65,72,0,10,0,195,0,0,83,65,65,66,0,0,1],"dst_nsap":[71,0,39,129,131,76,86,0,1,82,82,1,1,0,0,69,83,48,49,1],"lifetime":20.000000,"flags":{"SP":true,"MS":false,"ER":false},"segmentation":{"pdu_id":37,"segment_offset":0,"pdu_total_len":122},"reasm_status":"skipped","options":[{"name":"lref","value":[0]},{"name":"qos_maintenance","value":[214]},{"name":"security","value":{"reg_id":[6,4,43,27,0,0],"sec_info":[{"name":"traffic_type","value":{"type_id":1,"type_name":"ATN operational","category_id":1,"category_name":"ATSC","route_policy":16}}]}},{"name":"priority","value":[8]}],"cotp":{"pdu_list":[{"err":false,"tpdu_code":224,"tpdu_code_descr":"Connect Request","extended":false,"src_ref":50,"dst_ref":0,"credit":1,"proto_class":4,"options":0,"use_extended_pdu_formats":false,"variable_part_params":[{"name":"tpdu_size","value":1024},{"name":"called_responding_transport_selector","value":[99,109]},{"name":"calling_transport_selector","value":[1]},{"name":"priority","value":6},{"name":"additional_options","value":[0]},{"name":"ack_time_ms","value":1000},{"name":"inactivity_timer_ms","value":360000},{"name":"checksum","value":[78,246]},{"name":"atn_checksum","value":[86,4,191,164]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852787,"usec":632133},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.589893,"noise_level":-16.270395,"freq_skew":3.096214,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852788,"usec":335211},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.222033,"noise_level":-16.896072,"freq_skew":2.896214,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":0,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":38,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2991,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[217,182,42,205]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":89290},"freq":136975000,"burst_len_octets":165,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.332107,"noise_level":-17.478905,"freq_skew":2.906682,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":3,"more":true,"reasm_status":"in progress","clnp":{"err":false,"compressed":true,"local_ref_a":0,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":39,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2991,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[59,27,220,224]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","unknown_proto":{"data":[0,32,16,66,177,176,48,16,28,172,108,6,162,5,12,0,40,47,129,53,137,6,67,54,46,24,160,162,32,164,0,66,128,48,192,0,10,104,40,40,64,0,0,32,32,64,0,4,20,68,20,128,8,80,6,24,0,1,77,5,5,8,0,0,4,0,88,0,130,136,130,144,1,10,0,195,0,0,41,160,160,161,0,0,0,139,11,0,144,81,16,82,0,33,64,24,96,0,5,52,20,20,32,0,0,17,107,81,227]}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":89290},"freq":136975000,"burst_len_octets":165,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-3.332107,"noise_level":-17.478905,"freq_skew":2.906682,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":3,"more":false,"reasm_status":"complete","clnp":{"err":false,"compressed":true,"local_ref_a":0,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":39,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2991,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[59,27,220,224]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","x227_apdu":{"acse_apdu":{"choice":"aarq","data":{"assoc_request":{"app_ctx_name":[1,3,27,3,1],"ap_title":{"choice":"ap-title-form2","data":{"ap_title_form2":[1,3,27,1,655555,0]}}}}},"context_mgmt":{"cm_aircraft_message":{"choice":"cmLogonRequest","data":{"atn_context_mgmt_logon_request":{"flight_id":"DAH3181","long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,1]}},"ground_initiated_apps":[{"ae_qualifier_version_address":{"ae_qualifier":0,"version":1,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,0]}}}}}},{"ae_qualifier_version_address":{"ae_qualifier":22,"version":1,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,22]}}}}}},{"ae_qualifier_version_address":{"ae_qualifier":22,"version":2,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,22]}}}}}}],"departure_airport":"ZGGG","destination_airport":"DAAG"}}}}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":90785},"freq":136975000,"burst_len_octets":32,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.759093,"noise_level":-18.442379,"freq_skew":2.941501,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":254,"sseq":1,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":68,"priority":11,"lifetime":50.000000,"flags":192,"pdu_id":2805,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2032,"credit":2,"rseq":2,"variable_part_params":[{"name":"checksum","value":[216,252]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":850458},"freq":136975000,"burst_len_octets":32,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.962137,"noise_level":-18.319826,"freq_skew":3.132240,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":254,"sseq":2,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":68,"priority":11,"lifetime":50.000000,"flags":192,"pdu_id":2806,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2032,"credit":2,"rseq":3,"variable_part_params":[{"name":"checksum","value":[212,0]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":853807},"freq":136975000,"burst_len_octets":69,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.259077,"noise_level":-18.262747,"freq_skew":2.806419,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":0,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":40,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2991,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[77,86,37,189]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":853807},"freq":136975000,"burst_len_octets":69,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-3.259077,"noise_level":-18.262747,"freq_skew":2.806419,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":0,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":41,"cotp":{"pdu_list":[{"err":false,"tpdu_code":128,"tpdu_code_descr":"Disconnect Request","extended":false,"src_ref":50,"dst_ref":2991,"disc_reason_code":128,"disc_reason":"Normal disconnect","variable_part_params":[{"name":"atn_checksum","value":[222,164,221,82]}],"x225_spm_transport_disconnect_reason_code":1,"x225_spm_transport_disconnect_reason":"OK, transport connection not reused"}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852789,"usec":856769},"freq":136975000,"burst_len_octets":49,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.233602,"noise_level":-18.664106,"freq_skew":3.217432,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":254,"sseq":3,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":68,"priority":11,"lifetime":50.000000,"flags":192,"pdu_id":2807,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2032,"sseq":1,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"checksum","value":[9,139]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":1,"msg_ref":2,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":46,"sec":27}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852790,"usec":618893},"freq":136975000,"burst_len_octets":93,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.280509,"noise_level":-18.569523,"freq_skew":2.807271,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":true,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852790,"usec":618893},"freq":136975000,"burst_len_octets":93,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-3.280509,"noise_level":-18.569523,"freq_skew":2.807271,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":42,"cotp":{"pdu_list":[{"err":false,"tpdu_code":208,"tpdu_code_descr":"Connect Confirm","extended":false,"src_ref":51,"dst_ref":2955,"credit":1,"proto_class":4,"options":0,"use_extended_pdu_formats":false,"variable_part_params":[{"name":"tpdu_size","value":1024},{"name":"called_responding_transport_selector","value":[22]},{"name":"calling_transport_selector","value":[112,109]},{"name":"priority","value":3},{"name":"ack_time_ms","value":1000},{"name":"inactivity_timer_ms","value":360000},{"name":"additional_options","value":[0]},{"name":"atn_checksum","value":[86,161,64,154]}]}],"x225_spdu":{"spdu_id":240,"spdu_type":"Short Accept","x227_apdu":{"acse_apdu":{"choice":"aare","data":{"assoc_response":{"app_ctx_name":[1,3,27,3,2],"assoc_result":{"value":0,"value_descr":"accept"}}}},"cpdlc":{}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852790,"usec":626356},"freq":136975000,"burst_len_octets":50,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.323337,"noise_level":-19.673908,"freq_skew":2.756980,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":43,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2955,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[110,38,20,124]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":0,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":46,"sec":28}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"CURRENT DATA AUTHORITY","choice":"dM99NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852792,"usec":147700},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.373575,"noise_level":-19.377836,"freq_skew":2.882731,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852792,"usec":151630},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.351049,"noise_level":-20.620804,"freq_skew":2.739089,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":44,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2955,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[128,71,37,189]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852792,"usec":155583},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.822494,"noise_level":-21.830843,"freq_skew":2.843688,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852792,"usec":919263},"freq":136975000,"burst_len_octets":83,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.265710,"noise_level":-21.546011,"freq_skew":2.901645,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":45,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2955,"credit":2,"rseq":3,"variable_part_params":[{"name":"atn_checksum","value":[43,224,137,19]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852792,"usec":919263},"freq":136975000,"burst_len_octets":83,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-3.265710,"noise_level":-21.546011,"freq_skew":2.901645,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":46,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2955,"sseq":1,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[25,147,78,89]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":1,"msg_ref":3,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":46,"sec":31}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852793,"usec":679642},"freq":136975000,"burst_len_octets":77,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.911857,"noise_level":-21.997213,"freq_skew":-0.865558,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":722,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2033,"credit":3,"rseq":7,"variable_part_params":[{"name":"atn_checksum","value":[252,209,95,45]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852793,"usec":679642},"freq":136975000,"burst_len_octets":77,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.911857,"noise_level":-21.997213,"freq_skew":-0.865558,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":723,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2033,"credit":3,"rseq":7,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":6,"acked_subseq":0,"acked_credit":3}},{"name":"atn_checksum","value":[247,246,249,202]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852793,"usec":680615},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.294755,"noise_level":-22.770452,"freq_skew":2.757852,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":47,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2955,"sseq":2,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[252,27,237,140]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":2,"msg_ref":2,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":46,"sec":31}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852795,"usec":265503},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.389513,"noise_level":-22.607742,"freq_skew":2.644953,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852795,"usec":269376},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.917325,"noise_level":-22.537661,"freq_skew":-0.803191,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852798,"usec":265286},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.243511,"noise_level":-22.203423,"freq_skew":-0.988999,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852802,"usec":867361},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.822212,"noise_level":-20.971334,"freq_skew":-0.947240,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852808,"usec":928523},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.464766,"noise_level":-19.317612,"freq_skew":2.625876,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":3,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"_d","blk_id":"9","ack":"F","flight":"BT0272","msg_num":"S70","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852809,"usec":675990},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.148023,"noise_level":-20.488693,"freq_skew":2.425817,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":1}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852812,"usec":735579},"freq":136975000,"burst_len_octets":59,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.346714,"noise_level":-20.307131,"freq_skew":2.463927,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"U","cmd":"XID","pf":true,"xid":{"err":false,"type":"XID_CMD_HO","type_descr":"Handoff Initiation","pub_params":[{"name":"param_set_id","value":"8885:1993"},{"name":"procedure_classes","value":[0,1]},{"name":"hdlc_options","value":[32,164,136]}],"vdl_params":[{"name":"param_set_id","value":"V"},{"name":"conn_mgmt","value":5},{"name":"xid_sequencing","value":{"seq":5,"retry":0}},{"name":"avlc_specific_options","value":[37]},{"name":"dst_airport","value":"EVRA"}]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852813,"usec":516740},"freq":136975000,"burst_len_octets":80,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.694770,"noise_level":-21.083242,"freq_skew":2.642881,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":11,"pkt_type_name":"Call Request","chan_group":11,"chan_num":255,"calling_addr":"24026625","facilities":[{"name":"max_pkt_size","value":{"from_calling_dte":1024,"from_called_dte":1024}},{"name":"window_size","value":{"from_calling_dte":4,"from_called_dte":4}},{"name":"fast_select","value":true},{"name":"called_addr_extension","value":[140,88,65,65,2,0,147]}],"compression_options":19,"compression_algos":["LREF","LREF-CAN"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":30,"net":[71,0,39,65,66,84,73,0,80,45,149,0,1,0,0,0,0,0,1,0]}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852814,"usec":269061},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.392393,"noise_level":-21.053774,"freq_skew":2.530818,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"Q0","blk_id":"0","ack":"!","flight":"BT0272","msg_num":"S71","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852818,"usec":92832},"freq":136975000,"burst_len_octets":56,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.499425,"noise_level":-19.835306,"freq_skew":2.611598,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852818,"usec":92832},"freq":136975000,"burst_len_octets":56,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.499425,"noise_level":-19.835306,"freq_skew":2.611598,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":1,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"Q0","blk_id":"0","ack":"!","flight":"BT0272","msg_num":"S71","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852818,"usec":855837},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.652770,"noise_level":-20.025696,"freq_skew":2.993300,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852820,"usec":331708},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.721849,"noise_level":-19.534565,"freq_skew":2.336273,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852832,"usec":560727},"freq":136975000,"burst_len_octets":62,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.008952,"noise_level":-17.538628,"freq_skew":2.790724,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":48,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2955,"credit":3,"rseq":4,"variable_part_params":[{"name":"atn_checksum","value":[158,128,132,3]}]},{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2955,"sseq":3,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[175,230,137,73]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":3,"msg_ref":4,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":47,"sec":10}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852834,"usec":800863},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.283662,"noise_level":-17.369541,"freq_skew":2.662410,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852847,"usec":36669},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.004096,"noise_level":-16.845095,"freq_skew":-0.944804,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":724,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32923,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[131,26,30,116]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852848,"usec":567395},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.792789,"noise_level":-17.188843,"freq_skew":-0.902282,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852850,"usec":807381},"freq":136975000,"burst_len_octets":55,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.329717,"noise_level":-17.692440,"freq_skew":2.759438,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":49,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2955,"sseq":4,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[132,89,32,21]}]}],"x227_apdu":{"acse_apdu":{"choice":"rlre","data":{"release_response":{"reason":{"value":0,"value_descr":"normal"}}}},"cpdlc":{"atc_downlink_message":{"header":{"msg_id":4,"msg_ref":4,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":47,"sec":28}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852851,"usec":574477},"freq":136975000,"burst_len_octets":35,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.286425,"noise_level":-18.676682,"freq_skew":2.801409,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":50,"cotp":{"pdu_list":[{"err":false,"tpdu_code":192,"tpdu_code_descr":"Disconnect Confirm","extended":false,"src_ref":51,"dst_ref":2955,"variable_part_params":[{"name":"atn_checksum","value":[25,253,218,39]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852856,"usec":926147},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.463912,"noise_level":-18.834372,"freq_skew":2.968789,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852898,"usec":159771},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.216767,"noise_level":-16.878824,"freq_skew":3.006140,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":254,"sseq":4,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":50.000000,"flags":192,"pdu_id":2808,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":3,"ack":2,"credit_offered":5,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852907,"usec":330741},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.830160,"noise_level":-16.659550,"freq_skew":-0.746806,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":7}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852911,"usec":151921},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.403690,"noise_level":-17.219822,"freq_skew":3.212243,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852911,"usec":867109},"freq":136975000,"burst_len_octets":42,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.933597,"noise_level":-17.051184,"freq_skew":3.082039,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":254,"sseq":5,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":68,"priority":11,"lifetime":50.000000,"flags":192,"pdu_id":2809,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2032,"credit":2,"rseq":3,"variable_part_params":[{"name":"checksum","value":[65,240]},{"name":"flow_control","value":{"acked_tpdu_nr":2,"acked_subseq":0,"acked_credit":2}}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852914,"usec":165474},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.811191,"noise_level":-17.338089,"freq_skew":-0.739491,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":725,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2033,"credit":3,"rseq":7,"variable_part_params":[{"name":"atn_checksum","value":[252,209,95,45]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852914,"usec":166154},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.507817,"noise_level":-17.612101,"freq_skew":2.431354,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":2,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABV","mode":"2","label":"H1","blk_id":"1","ack":"!","flight":"BT0272","msg_num":"704","msg_num_seq":"A","sublabel":"T7","msg_text":"R001V0106,180301,, YL-ABV,5318410-07,736830,736681,02672,LOWW,EVRA,08:52:15,2026:01:31,BT272 ,000010,040201,5000(09:21:58),/Q,0.28,/S,,,,,,,,,17.484,17.383,664,664,63848,63848,51c62,51c42,40050,00050,0000"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852914,"usec":915585},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.688447,"noise_level":-18.862007,"freq_skew":-0.905969,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":726,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2033,"credit":3,"rseq":7,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":6,"acked_subseq":0,"acked_credit":3}},{"name":"atn_checksum","value":[247,246,249,202]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852915,"usec":680850},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.780793,"noise_level":-18.651241,"freq_skew":-0.919511,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852916,"usec":445757},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.552468,"noise_level":-18.489155,"freq_skew":2.286836,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":3,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABV","mode":"2","label":"H1","blk_id":"2","ack":"!","flight":"BT0272","msg_num":"704","msg_num_seq":"B","sublabel":"T7","msg_text":"0,00000,00000,00000,-24.50,-20.12,0.285,0.090,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,2087"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852917,"usec":216778},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.579898,"noise_level":-19.300659,"freq_skew":2.267697,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":4,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABV","mode":"2","label":"H1","blk_id":"3","ack":"!","flight":"BT0272","msg_num":"704","msg_num_seq":"C","sublabel":"T7","msg_text":"8,20075,00800,00800,00000,00000,00000,00000,00001,00001,03b15,03b25,263,263,1849827,1849842,/A,72.945,72.961,11.09,11.45,2.81,4.55,5.176,5.174,-37.44,-37.19,36.56,36.91,201.81,204.56,264.19,15.922,15.777,60"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852920,"usec":272090},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.775854,"noise_level":-18.592989,"freq_skew":2.407289,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852920,"usec":275134},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.546879,"noise_level":-19.730722,"freq_skew":2.483721,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":5,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABV","mode":"2","label":"H1","blk_id":"4","ack":"!","flight":"BT0272","msg_num":"704","msg_num_seq":"D","sublabel":"T7","msg_text":".94,60.56,488.31,489.69,99.20,99.72,69.50,69.75,94.477,94.477,72.25,71.69,72.938,72.945,72.31,71.69,11.625,11.227,109.55,109.47,123.39,111.92,85.0,85.0,69.477,69.742,0.137,0.125,0.1240,0.1631,21,65,85.52,85"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852922,"usec":570050},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.504936,"noise_level":-19.812176,"freq_skew":2.381999,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852923,"usec":323177},"freq":136975000,"burst_len_octets":170,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.673574,"noise_level":-20.629330,"freq_skew":2.353792,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"H1","blk_id":"5","ack":"!","flight":"BT0272","msg_num":"704","msg_num_seq":"E","sublabel":"T7","msg_text":"R001V0106,180301,, YL-ABV,5318410-07,736830,736681,02672,LOWW,EVRA,08:52:15,2026:01:31,BT272 ,000010,040201,5000(09:21:58),/Q,0.28,/S,,,,,,,,,17.484,17.383,664,664,63848,63848,51c62,51c42,40050,00050,00000,00000,00000,00000,-24.50,-20.12,0.285,0.090,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,20878,20075,00800,00800,00000,00000,00000,00000,00001,00001,03b15,03b25,263,263,1849827,1849842,/A,72.945,72.961,11.09,11.45,2.81,4.55,5.176,5.174,-37.44,-37.19,36.56,36.91,201.81,204.56,264.19,15.922,15.777,60.94,60.56,488.31,489.69,99.20,99.72,69.50,69.75,94.477,94.477,72.25,71.69,72.938,72.945,72.31,71.69,11.625,11.227,109.55,109.47,123.39,111.92,85.0,85.0,69.477,69.742,0.137,0.125,0.1240,0.1631,21,65,85.52,85.52,2228.5,2263.0,344.0,337.5,2031.5,2003.0,85.55,85.58,690.8,681.0,85.52,85.52,2243.0,2262.0,-38.102,34990,0.77930,: "}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852924,"usec":860845},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.603305,"noise_level":-21.253277,"freq_skew":2.252696,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852937,"usec":807708},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.750030,"noise_level":-17.722971,"freq_skew":-0.863462,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":5,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"3","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"A","sublabel":"T8","msg_text":"R003V0201,180301,, YL-ABF,5318410-07,736713,736680,07394,EVRA,LEBL,09:25:13,2026:01:31,BT683 ,000010,090204,5000_CLIMB_0200(09:25:13),/S,664,664,63848,63848,71c62,71c42,40050,40050,00000,00000,0,0,00000,0"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852939,"usec":402019},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.736968,"noise_level":-17.400225,"freq_skew":-0.832871,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":6,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"4","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"B","sublabel":"T8","msg_text":"0000,2.50,0.56,0.098,0.137,0.2363,0.2598,0.062,0.051,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,0,0,0,0,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,0"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852942,"usec":387194},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.896681,"noise_level":-17.573980,"freq_skew":-1.019938,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852942,"usec":389979},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.933537,"noise_level":-17.665333,"freq_skew":-0.764369,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"5","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"C","sublabel":"T8","msg_text":"0000,00000,20878,20878,00800,00800,00000,00000,00000,00000,00001,00001,132125,5,5,23842,23842,348,/A,35.15,35.01,67.101,67.077,9.73,9.37,11.343,11.344,-5.55,-6.18,398.96,403.50,273.85,273.83,-5.09,-5.10,31."}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852943,"usec":868638},"freq":136975000,"burst_len_octets":254,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.841188,"noise_level":-17.531712,"freq_skew":-1.053647,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"6","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"D","sublabel":"T8","msg_text":"601,31.038,94.12,92.09,555.75,554.84,99.85,99.89,66.62,68.19,94.477,94.477,39.88,39.73,67.103,67.082,39.78,39.82,10.738,12.402,101.74,103.21,132.52,129.16,66.616,68.172,86.38,86.36,4693.1,4883.5,446.5,439.5"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852945,"usec":396907},"freq":136975000,"burst_len_octets":255,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.777754,"noise_level":-17.265198,"freq_skew":-0.970096,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":1,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"7","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"E","sublabel":"T8","msg_text":",4303.9,4263.1,89.70,89.81,809.8,800.5,86.38,86.36,4701.3,4866.2,-5.176,11593,0.50934,TIME_IN_CLIMB_SNAP_0100(09:47:39),/S,664,664,63848,63848,71c62,71c42,40050,40050,00000,00000,0,0,00000,00000,-15.62,-11."}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852948,"usec":448527},"freq":136975000,"burst_len_octets":266,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.833289,"noise_level":-17.668880,"freq_skew":-0.887497,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852948,"usec":448527},"freq":136975000,"burst_len_octets":266,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.833289,"noise_level":-17.668880,"freq_skew":-0.887497,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":2,"poll":false,"acars":{"err":false,"crc_ok":true,"more":true,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"8","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"F","sublabel":"T8","msg_text":"37,0.125,0.113,0.1514,0.3320,0.004,0.062,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,0,0,0,0,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,2"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852951,"usec":511732},"freq":136975000,"burst_len_octets":153,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.882236,"noise_level":-17.148346,"freq_skew":-0.764124,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852951,"usec":511732},"freq":136975000,"burst_len_octets":153,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.882236,"noise_level":-17.148346,"freq_skew":-0.764124,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABF","mode":"2","label":"H1","blk_id":"9","ack":"!","flight":"BT0683","msg_num":"830","msg_num_seq":"G","sublabel":"T8","msg_text":"R003V0201,180301,, YL-ABF,5318410-07,736713,736680,07394,EVRA,LEBL,09:25:13,2026:01:31,BT683 ,000010,090204,5000_CLIMB_0200(09:25:13),/S,664,664,63848,63848,71c62,71c42,40050,40050,00000,00000,0,0,00000,00000,2.50,0.56,0.098,0.137,0.2363,0.2598,0.062,0.051,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,0,0,0,0,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,20878,20878,00800,00800,00000,00000,00000,00000,00001,00001,132125,5,5,23842,23842,348,/A,35.15,35.01,67.101,67.077,9.73,9.37,11.343,11.344,-5.55,-6.18,398.96,403.50,273.85,273.83,-5.09,-5.10,31.601,31.038,94.12,92.09,555.75,554.84,99.85,99.89,66.62,68.19,94.477,94.477,39.88,39.73,67.103,67.082,39.78,39.82,10.738,12.402,101.74,103.21,132.52,129.16,66.616,68.172,86.38,86.36,4693.1,4883.5,446.5,439.5,4303.9,4263.1,89.70,89.81,809.8,800.5,86.38,86.36,4701.3,4866.2,-5.176,11593,0.50934,TIME_IN_CLIMB_SNAP_0100(09:47:39),/S,664,664,63848,63848,71c62,71c42,40050,40050,00000,00000,0,0,00000,00000,-15.62,-11.37,0.125,0.113,0.1514,0.3320,0.004,0.062,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,0,0,0,0,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,20878,20878,00800,00800,00000,00000,00000,00000,00001,00001,129790,5,5,25188,25188,1695,: "}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852955,"usec":338844},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.502441,"noise_level":-17.061592,"freq_skew":-0.697125,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852959,"usec":867470},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.549557,"noise_level":-17.483160,"freq_skew":3.121899,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852966,"usec":753907},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.130780,"noise_level":-17.369289,"freq_skew":-1.013531,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":727,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32923,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[131,26,30,116]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852971,"usec":335055},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.685418,"noise_level":-17.552311,"freq_skew":-0.818690,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":727,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32923,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[131,26,30,116]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852972,"usec":44787},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.863509,"noise_level":-18.063398,"freq_skew":-0.755728,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852975,"usec":865400},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-6.133972,"noise_level":-17.541691,"freq_skew":2.891910,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852981,"usec":220185},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.693775,"noise_level":-17.057837,"freq_skew":-1.055805,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":3}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852982,"usec":752115},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":1,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.928704,"noise_level":-17.426107,"freq_skew":-1.054804,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":728,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2033,"credit":3,"rseq":8,"variable_part_params":[{"name":"atn_checksum","value":[82,158,145,215]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852983,"usec":511302},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.869078,"noise_level":-17.314814,"freq_skew":-0.830538,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":729,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2033,"sseq":6,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[78,246,216,107]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":6,"msg_ref":7,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":49,"sec":40}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852984,"usec":283717},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.942994,"noise_level":-17.082043,"freq_skew":-0.795478,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852985,"usec":811886},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.629145,"noise_level":-17.220676,"freq_skew":-0.871911,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852990,"usec":337052},"freq":136975000,"burst_len_octets":55,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.992004,"noise_level":-16.900085,"freq_skew":-0.945399,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":730,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2033,"sseq":7,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[48,194,239,141]}]}],"x227_apdu":{"acse_apdu":{"choice":"rlre","data":{"release_response":{"reason":{"value":0,"value_descr":"normal"}}}},"cpdlc":{"atc_downlink_message":{"header":{"msg_id":7,"msg_ref":7,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":49,"sec":47}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852990,"usec":341692},"freq":136975000,"burst_len_octets":50,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.241360,"noise_level":-17.581074,"freq_skew":-0.823514,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":731,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":32923,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[87,58,26,138]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":0,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":49,"sec":47}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"CURRENT DATA AUTHORITY","choice":"dM99NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852991,"usec":109722},"freq":136975000,"burst_len_octets":35,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.938156,"noise_level":-17.347553,"freq_skew":-0.829940,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":65,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":732,"cotp":{"pdu_list":[{"err":false,"tpdu_code":192,"tpdu_code_descr":"Disconnect Confirm","extended":false,"src_ref":11607,"dst_ref":2033,"variable_part_params":[{"name":"atn_checksum","value":[182,112,62,26]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852991,"usec":868344},"freq":136975000,"burst_len_octets":29,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.876604,"noise_level":-17.277433,"freq_skew":-0.937534,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":true,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852991,"usec":868344},"freq":136975000,"burst_len_octets":29,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.876604,"noise_level":-17.277433,"freq_skew":-0.937534,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":7}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852991,"usec":870781},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.076842,"noise_level":-18.158571,"freq_skew":-0.884521,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":733,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32923,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[246,185,25,100]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852993,"usec":397213},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.911571,"noise_level":-17.875149,"freq_skew":-1.000750,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769852999,"usec":516066},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.440177,"noise_level":-17.863586,"freq_skew":2.320343,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":51,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":4,"ack":2,"credit_offered":3,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853001,"usec":40301},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.738185,"noise_level":-17.633377,"freq_skew":2.343781,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853006,"usec":347479},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.033726,"noise_level":-17.378511,"freq_skew":-0.965512,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853007,"usec":113356},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.201924,"noise_level":-17.278210,"freq_skew":-0.942174,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":734,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32923,"credit":2,"rseq":2,"variable_part_params":[{"name":"atn_checksum","value":[76,134,75,15]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853025,"usec":407000},"freq":136975000,"burst_len_octets":143,"hdr_bits_fixed":0,"octets_corrected_by_fec":2,"idx":0,"sig_level":-5.081078,"noise_level":-16.647848,"freq_skew":1.127494,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":false,"pdu_type":28,"pdu_type_name":"Data","src_nsap":[71,0,39,65,66,84,73,0,80,44,215,0,1,0,0,0,0,0,1,1],"dst_nsap":[71,0,39,129,131,76,84,0,1,86,67,1,1,0,0,69,83,48,49,1],"lifetime":20.000000,"flags":{"SP":true,"MS":false,"ER":false},"segmentation":{"pdu_id":741,"segment_offset":0,"pdu_total_len":123},"reasm_status":"skipped","options":[{"name":"lref","value":[2]},{"name":"qos_maintenance","value":[214]},{"name":"security","value":{"reg_id":[6,4,43,27,0,0],"sec_info":[{"name":"traffic_type","value":{"type_id":1,"type_name":"ATN operational","category_id":1,"category_name":"ATSC","route_policy":18}}]}},{"name":"priority","value":[8]}],"cotp":{"pdu_list":[{"err":false,"tpdu_code":224,"tpdu_code_descr":"Connect Request","extended":false,"src_ref":721,"dst_ref":0,"credit":1,"proto_class":4,"options":0,"use_extended_pdu_formats":false,"variable_part_params":[{"name":"tpdu_size","value":1024},{"name":"called_responding_transport_selector","value":[99,109]},{"name":"calling_transport_selector","value":[67,77]},{"name":"priority","value":6},{"name":"additional_options","value":[0]},{"name":"ack_time_ms","value":1000},{"name":"inactivity_timer_ms","value":360000},{"name":"checksum","value":[122,64]},{"name":"atn_checksum","value":[90,147,177,118]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853026,"usec":934298},"freq":136975000,"burst_len_octets":46,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.968091,"noise_level":-16.454353,"freq_skew":1.128272,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853026,"usec":934298},"freq":136975000,"burst_len_octets":46,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.968091,"noise_level":-16.454353,"freq_skew":1.128272,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":2,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":742,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2045,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[240,120,74,21]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853026,"usec":936461},"freq":136975000,"burst_len_octets":118,"hdr_bits_fixed":1,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.289711,"noise_level":-16.425528,"freq_skew":1.083256,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":2,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":743,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2045,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[12,230,43,40]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","x227_apdu":{"acse_apdu":{"choice":"aarq","data":{"assoc_request":{"app_ctx_name":[1,3,27,3,1],"ap_title":{"choice":"ap-title-form2","data":{"ap_title_form2":[1,3,27,1,5254359,0]}}}}},"context_mgmt":{"cm_aircraft_message":{"choice":"cmLogonRequest","data":{"atn_context_mgmt_logon_request":{"flight_id":"BTI6AL","long_tsap":{"rdp":[65,66,84,73,0],"short_tsap":{"ars":[80,44,215],"loc_sys_nsel_tsel":[0,1,0,0,0,0,0,1,1,67,77]}},"ground_initiated_apps":[{"ae_qualifier_version_address":{"ae_qualifier":22,"version":1,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,66,84,73,0],"short_tsap":{"ars":[80,44,215],"loc_sys_nsel_tsel":[0,1,0,0,0,0,0,1,1,22,0]}}}}}}],"departure_airport":"EVRA","destination_airport":"HEGN"}}}}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853031,"usec":578556},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.742520,"noise_level":-17.395805,"freq_skew":1.204594,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":true,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853031,"usec":580432},"freq":136975000,"burst_len_octets":142,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.597879,"noise_level":-17.376520,"freq_skew":2.271255,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":false,"pdu_type":28,"pdu_type_name":"Data","src_nsap":[71,0,39,65,68,65,72,0,10,0,195,0,0,83,65,65,66,0,0,1],"dst_nsap":[71,0,39,129,131,80,76,0,1,87,87,1,1,0,0,69,83,48,49,1],"lifetime":20.000000,"flags":{"SP":true,"MS":false,"ER":false},"segmentation":{"pdu_id":52,"segment_offset":0,"pdu_total_len":122},"reasm_status":"skipped","options":[{"name":"lref","value":[1]},{"name":"qos_maintenance","value":[214]},{"name":"security","value":{"reg_id":[6,4,43,27,0,0],"sec_info":[{"name":"traffic_type","value":{"type_id":1,"type_name":"ATN operational","category_id":1,"category_name":"ATSC","route_policy":16}}]}},{"name":"priority","value":[8]}],"cotp":{"pdu_list":[{"err":false,"tpdu_code":224,"tpdu_code_descr":"Connect Request","extended":false,"src_ref":52,"dst_ref":0,"credit":1,"proto_class":4,"options":0,"use_extended_pdu_formats":false,"variable_part_params":[{"name":"tpdu_size","value":1024},{"name":"called_responding_transport_selector","value":[99,109]},{"name":"calling_transport_selector","value":[1]},{"name":"priority","value":6},{"name":"additional_options","value":[0]},{"name":"ack_time_ms","value":1000},{"name":"inactivity_timer_ms","value":360000},{"name":"checksum","value":[12,61]},{"name":"atn_checksum","value":[207,135,42,55]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853031,"usec":582211},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.401177,"noise_level":-18.474655,"freq_skew":0.976635,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":4}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853032,"usec":281408},"freq":136975000,"burst_len_octets":198,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.608371,"noise_level":-18.344467,"freq_skew":2.139974,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":53,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32948,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[168,248,238,121]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853032,"usec":281408},"freq":136975000,"burst_len_octets":198,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.608371,"noise_level":-18.344467,"freq_skew":2.139974,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":3,"more":true,"reasm_status":"in progress","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":54,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":32948,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[13,146,174,71]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","unknown_proto":{"data":[0,32,16,66,177,176,48,16,28,172,108,6,162,5,12,0,40,47,129,53,137,6,67,54,46,24,160,162,32,164,0,66,128,48,192,0,10,104,40,40,64,0,0,32,32,64,0,4,20,68,20,128,8,80,6,24,0,1,77,5,5,8,0,0,4,0,88,0,130,136,130,144,1,10,0,195,0,0,41,160,160,161,0,0,0,139,11,0,144,81,16,82,0,33,64,24,96,0,5,52,20,20,32,0,0,17,107,81,227]}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853032,"usec":281408},"freq":136975000,"burst_len_octets":198,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":2,"sig_level":-4.608371,"noise_level":-18.344467,"freq_skew":2.139974,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":3,"more":false,"reasm_status":"complete","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":54,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":32948,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[13,146,174,71]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","x227_apdu":{"acse_apdu":{"choice":"aarq","data":{"assoc_request":{"app_ctx_name":[1,3,27,3,1],"ap_title":{"choice":"ap-title-form2","data":{"ap_title_form2":[1,3,27,1,655555,0]}}}}},"context_mgmt":{"cm_aircraft_message":{"choice":"cmLogonRequest","data":{"atn_context_mgmt_logon_request":{"flight_id":"DAH3181","long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,1]}},"ground_initiated_apps":[{"ae_qualifier_version_address":{"ae_qualifier":0,"version":1,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,0]}}}}}},{"ae_qualifier_version_address":{"ae_qualifier":22,"version":1,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,22]}}}}}},{"ae_qualifier_version_address":{"ae_qualifier":22,"version":2,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,68,65,72,0],"short_tsap":{"ars":[10,0,195],"loc_sys_nsel_tsel":[0,0,83,65,65,66,0,0,1,22]}}}}}}],"departure_airport":"ZGGG","destination_airport":"DAAG"}}}}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853032,"usec":281630},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-10.797155,"noise_level":-18.344467,"freq_skew":0.985185,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":2,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":744,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2045,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[100,24,69,5]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853033,"usec":37568},"freq":136975000,"burst_len_octets":37,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.051618,"noise_level":-18.173864,"freq_skew":1.153035,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":2,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":745,"cotp":{"pdu_list":[{"err":false,"tpdu_code":128,"tpdu_code_descr":"Disconnect Request","extended":false,"src_ref":721,"dst_ref":2045,"disc_reason_code":128,"disc_reason":"Normal disconnect","variable_part_params":[{"name":"atn_checksum","value":[156,144,188,104]}],"x225_spm_transport_disconnect_reason_code":1,"x225_spm_transport_disconnect_reason":"OK, transport connection not reused"}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853033,"usec":41052},"freq":136975000,"burst_len_octets":177,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.487874,"noise_level":-19.298841,"freq_skew":2.340366,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":53,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32948,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[168,248,238,121]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853033,"usec":41052},"freq":136975000,"burst_len_octets":177,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.487874,"noise_level":-19.298841,"freq_skew":2.340366,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":3,"more":true,"reasm_status":"in progress","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":54,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":32948,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[13,146,174,71]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","unknown_proto":{"data":[0,32,16,66,177,176,48,16,28,172,108,6,162,5,12,0,40,47,129,53,137,6,67,54,46,24,160,162,32,164,0,66,128,48,192,0,10,104,40,40,64,0,0,32,32,64,0,4,20,68,20,128,8,80,6,24,0,1,77,5,5,8,0,0,4,0,88,0,130,136,130,144,1,10,0,195,0,0,41,160,160,161,0,0,0,139,11,0,144,81,16,82,0,33,64,24,96,0,5,52,20,20,32,0,0,17,107,81,227]}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":283212},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.715158,"noise_level":-18.717787,"freq_skew":2.079702,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"out of sequence","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":53,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32948,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[168,248,238,121]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":285576},"freq":136975000,"burst_len_octets":323,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.561557,"noise_level":-19.853256,"freq_skew":2.388467,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":3,"more":true,"reasm_status":"in progress","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":54,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":32948,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[13,146,174,71]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","unknown_proto":{"data":[0,32,16,66,177,176,48,16,28,172,108,6,162,5,12,0,40,47,129,53,137,6,67,54,46,24,160,162,32,164,0,66,128,48,192,0,10,104,40,40,64,0,0,32,32,64,0,4,20,68,20,128,8,80,6,24,0,1,77,5,5,8,0,0,4,0,88,0,130,136,130,144,1,10,0,195,0,0,41,160,160,161,0,0,0,139,11,0,144,81,16,82,0,33,64,24,96,0,5,52,20,20,32,0,0,17,107,81,227]}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":285576},"freq":136975000,"burst_len_octets":323,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.561557,"noise_level":-19.853256,"freq_skew":2.388467,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"U","cmd":"XID","pf":true,"xid":{"err":false,"type":"XID_RSP_HO","type_descr":"Handoff Response","pub_params":[{"name":"param_set_id","value":"8885:1993"},{"name":"procedure_classes","value":[0,1]},{"name":"hdlc_options","value":[32,164,128]}],"vdl_params":[{"name":"param_set_id","value":"V"},{"name":"conn_mgmt","value":1},{"name":"xid_sequencing","value":{"seq":4,"retry":0}},{"name":"avlc_specific_options","value":[37]},{"name":"dst_airport","value":"DAAG"},{"name":"ac_location","value":{"loc":{"lat":55.700001,"lon":25.600000},"alt":38000}}]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":285576},"freq":136975000,"burst_len_octets":323,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":2,"sig_level":-4.561557,"noise_level":-19.853256,"freq_skew":2.388467,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".7T-VJE","mode":"2","label":"Q0","blk_id":"3","ack":"!","flight":"AH3181","msg_num":"S11","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":285576},"freq":136975000,"burst_len_octets":323,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":3,"sig_level":-4.561557,"noise_level":-19.853256,"freq_skew":2.388467,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":11,"pkt_type_name":"Call Request","chan_group":11,"chan_num":255,"calling_addr":"02400303","facilities":[{"name":"fast_select","value":true},{"name":"called_addr_extension","value":[140,88,65,65,2,0,147]}],"compression_options":19,"compression_algos":["LREF","LREF-CAN"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":30,"net":[71,0,39,65,68,65,72,0,10,0,195,0,0,83,65,65,66,0,0,0]}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":287804},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.133880,"noise_level":-20.266676,"freq_skew":0.981079,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":4}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":289164},"freq":136975000,"burst_len_octets":69,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.099154,"noise_level":-20.230921,"freq_skew":0.988106,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":2,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":744,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2045,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[100,24,69,5]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853035,"usec":289164},"freq":136975000,"burst_len_octets":69,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-5.099154,"noise_level":-20.230921,"freq_skew":0.988106,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":2,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":745,"cotp":{"pdu_list":[{"err":false,"tpdu_code":128,"tpdu_code_descr":"Disconnect Request","extended":false,"src_ref":721,"dst_ref":2045,"disc_reason_code":128,"disc_reason":"Normal disconnect","variable_part_params":[{"name":"atn_checksum","value":[156,144,188,104]}],"x225_spm_transport_disconnect_reason_code":1,"x225_spm_transport_disconnect_reason":"OK, transport connection not reused"}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853036,"usec":53810},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.466950,"noise_level":-20.036865,"freq_skew":2.185828,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853038,"usec":342902},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.340539,"noise_level":-20.495012,"freq_skew":0.948990,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":7}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853038,"usec":352174},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.050704,"noise_level":-20.286049,"freq_skew":2.383757,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":53,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32948,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[168,248,238,121]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853039,"usec":107441},"freq":136975000,"burst_len_octets":145,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.454394,"noise_level":-21.134476,"freq_skew":2.203321,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":3,"more":true,"reasm_status":"in progress","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":54,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":32948,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[13,146,174,71]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","unknown_proto":{"data":[0,32,16,66,177,176,48,16,28,172,108,6,162,5,12,0,40,47,129,53,137,6,67,54,46,24,160,162,32,164,0,66,128,48,192,0,10,104,40,40,64,0,0,32,32,64,0,4,20,68,20,128,8,80,6,24,0,1,77,5,5,8,0,0,4,0,88,0,130,136,130,144,1,10,0,195,0,0,41,160,160,161,0,0,0,139,11,0,144,81,16,82,0,33,64,24,96,0,5,52,20,20,32,0,0,17,107,81,227]}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853039,"usec":111360},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.612859,"noise_level":-21.036057,"freq_skew":-0.803076,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":735,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":3,"ack":2,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853039,"usec":111589},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.577514,"noise_level":-21.401749,"freq_skew":2.373374,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853039,"usec":879330},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.646990,"noise_level":-21.440859,"freq_skew":2.359792,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":55,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":32948,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[28,152,233,105]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853039,"usec":879676},"freq":136975000,"burst_len_octets":37,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.749582,"noise_level":-21.901340,"freq_skew":2.389002,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":56,"cotp":{"pdu_list":[{"err":false,"tpdu_code":128,"tpdu_code_descr":"Disconnect Request","extended":false,"src_ref":52,"dst_ref":32948,"disc_reason_code":128,"disc_reason":"Normal disconnect","variable_part_params":[{"name":"atn_checksum","value":[108,143,57,253]}],"x225_spm_transport_disconnect_reason_code":1,"x225_spm_transport_disconnect_reason":"OK, transport connection not reused"}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853040,"usec":638853},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.176333,"noise_level":-21.751282,"freq_skew":-0.724007,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853040,"usec":639368},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.961285,"noise_level":-21.740664,"freq_skew":0.336759,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"S","cmd":"Receive Ready","pf":true,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853041,"usec":403024},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.619097,"noise_level":-21.510250,"freq_skew":2.231938,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853041,"usec":403355},"freq":136975000,"burst_len_octets":66,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.515543,"noise_level":-22.620895,"freq_skew":2.166445,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"B9","blk_id":"6","ack":"!","flight":"BT0272","msg_num":"L09","msg_num_seq":"A","msg_text":"/EVRA.TI2/024EVRAA8EDD"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853042,"usec":174731},"freq":136975000,"burst_len_octets":59,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.612588,"noise_level":-22.331198,"freq_skew":1.057996,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"U","cmd":"XID","pf":true,"xid":{"err":false,"type":"XID_RSP_HO","type_descr":"Handoff Response","pub_params":[{"name":"param_set_id","value":"8885:1993"},{"name":"procedure_classes","value":[0,1]},{"name":"hdlc_options","value":[32,164,136]}],"vdl_params":[{"name":"param_set_id","value":"V"},{"name":"conn_mgmt","value":5},{"name":"xid_sequencing","value":{"seq":1,"retry":0}},{"name":"avlc_specific_options","value":[37]},{"name":"dst_airport","value":"HEGN"}]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853042,"usec":175939},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.879095,"noise_level":-22.308506,"freq_skew":-0.989239,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853042,"usec":931453},"freq":136975000,"burst_len_octets":45,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.710934,"noise_level":-22.240789,"freq_skew":2.286744,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"_d","blk_id":"7","ack":"G","flight":"BT0272","msg_num":"S72","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853042,"usec":934693},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.222633,"noise_level":-23.236732,"freq_skew":1.034590,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853042,"usec":939925},"freq":136975000,"burst_len_octets":80,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.912612,"noise_level":-23.099136,"freq_skew":1.047466,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":11,"pkt_type_name":"Call Request","chan_group":11,"chan_num":255,"calling_addr":"24026327","facilities":[{"name":"max_pkt_size","value":{"from_calling_dte":1024,"from_called_dte":1024}},{"name":"window_size","value":{"from_calling_dte":4,"from_called_dte":4}},{"name":"fast_select","value":true},{"name":"called_addr_extension","value":[140,88,65,65,2,0,147]}],"compression_options":19,"compression_algos":["LREF","LREF-CAN"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":30,"net":[71,0,39,65,66,84,73,0,80,44,215,0,1,0,0,0,0,0,1,0]}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853043,"usec":701442},"freq":136975000,"burst_len_octets":50,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.506158,"noise_level":-22.830315,"freq_skew":0.963550,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":747,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2044,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[149,170,42,165]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":0,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":50,"sec":38}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"CURRENT DATA AUTHORITY","choice":"dM99NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853044,"usec":458989},"freq":136975000,"burst_len_octets":87,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.012341,"noise_level":-22.616394,"freq_skew":0.871126,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-CSH","mode":"2","label":"H1","blk_id":"2","ack":"!","flight":"BT0783","msg_num":"C44","msg_num_seq":"A","sublabel":"CF","msg_text":"232A03 31Jan2026 09:50:24 CRUISE 0\r\n"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853045,"usec":221909},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.391174,"noise_level":-22.339125,"freq_skew":2.154366,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":1,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"_d","blk_id":"8","ack":"H","flight":"BT0272","msg_num":"S73","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853045,"usec":227948},"freq":136975000,"burst_len_octets":16,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.525048,"noise_level":-23.260336,"freq_skew":1.231547,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Selective Reject","pf":false,"rseq":0,"unknown_proto":{"data":[33,65]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853045,"usec":992740},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.290231,"noise_level":-22.986557,"freq_skew":1.171390,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":2}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853045,"usec":996331},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.950499,"noise_level":-23.146614,"freq_skew":1.137333,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":true,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853046,"usec":757234},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.339692,"noise_level":-22.961428,"freq_skew":0.972393,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":748,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[66,229,69,90]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853048,"usec":285073},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.028128,"noise_level":-22.382618,"freq_skew":0.823821,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":5,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-CSH","mode":"2","label":"Q0","blk_id":"3","ack":"!","flight":"BT0783","msg_num":"S74","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853049,"usec":48804},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.172132,"noise_level":-22.079426,"freq_skew":1.249730,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":5,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":749,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":2,"rseq":2,"variable_part_params":[{"name":"atn_checksum","value":[151,178,119,5]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853049,"usec":757759},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.419639,"noise_level":-21.872242,"freq_skew":2.259894,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":182,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":5,"ack":3,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853050,"usec":518971},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":1,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.591532,"noise_level":-22.491062,"freq_skew":0.840881,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853050,"usec":522702},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.032895,"noise_level":-22.410440,"freq_skew":2.042002,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853065,"usec":766864},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.825863,"noise_level":-18.252663,"freq_skew":0.288177,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853100,"usec":61537},"freq":136975000,"burst_len_octets":91,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.752364,"noise_level":-16.902111,"freq_skew":0.163997,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":4,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".TC-JVT","mode":"2","label":"16","blk_id":"1","ack":"!","flight":"TK05BK","msg_num":"M45","msg_num_seq":"A","msg_text":"/N 56.518/E 24.550/20856/3101/0951/11120/1230/"}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853101,"usec":588239},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.016398,"noise_level":-17.735085,"freq_skew":0.451024,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853101,"usec":589278},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.954466,"noise_level":-18.443169,"freq_skew":-0.984027,"avlc":{"src":{"addr":"502D47","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":1}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853108,"usec":478345},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.495388,"noise_level":-17.557484,"freq_skew":2.015280,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":1}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853125,"usec":989384},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.102746,"noise_level":-16.805004,"freq_skew":0.489378,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853126,"usec":770632},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.954788,"noise_level":-17.083223,"freq_skew":0.503387,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":0}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853129,"usec":14040},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.721131,"noise_level":-17.570185,"freq_skew":1.005319,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853129,"usec":16737},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.652665,"noise_level":-17.543959,"freq_skew":0.898075,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":750,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":2,"rseq":3,"variable_part_params":[{"name":"atn_checksum","value":[236,127,169,175]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853130,"usec":535111},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.557931,"noise_level":-17.947443,"freq_skew":0.400993,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":0}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853130,"usec":538777},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.800952,"noise_level":-18.591196,"freq_skew":0.971966,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":751,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2044,"sseq":1,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[211,197,109,211]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":1,"msg_ref":2,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":52,"sec":8}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853132,"usec":60191},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.957918,"noise_level":-18.279287,"freq_skew":1.037125,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853133,"usec":587479},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.791437,"noise_level":-18.564936,"freq_skew":0.736827,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853136,"usec":651401},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.794801,"noise_level":-17.844599,"freq_skew":1.030265,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":752,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2044,"sseq":2,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[179,188,121,150]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":2,"msg_ref":2,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":52,"sec":15}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853138,"usec":236663},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.078540,"noise_level":-18.363083,"freq_skew":0.838423,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853138,"usec":949071},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.190520,"noise_level":-19.017771,"freq_skew":0.889715,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":753,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":4,"variable_part_params":[{"name":"atn_checksum","value":[96,31,164,159]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853157,"usec":188884},"freq":136975000,"burst_len_octets":180,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.415499,"noise_level":-16.579226,"freq_skew":2.018384,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"U","cmd":"XID","pf":true,"xid":{"err":false,"type":"XID_RSP_HO","type_descr":"Handoff Response","pub_params":[{"name":"param_set_id","value":"8885:1993"},{"name":"procedure_classes","value":[0,1]},{"name":"hdlc_options","value":[32,164,128]}],"vdl_params":[{"name":"param_set_id","value":"V"},{"name":"conn_mgmt","value":1},{"name":"xid_sequencing","value":{"seq":5,"retry":0}},{"name":"avlc_specific_options","value":[37]},{"name":"dst_airport","value":"DAAG"},{"name":"ac_location","value":{"loc":{"lat":55.500000,"lon":25.300001},"alt":37000}}]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853157,"usec":188884},"freq":136975000,"burst_len_octets":180,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-3.415499,"noise_level":-16.579226,"freq_skew":2.018384,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".7T-VJE","mode":"2","label":"Q0","blk_id":"4","ack":"!","flight":"AH3181","msg_num":"S12","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853157,"usec":188884},"freq":136975000,"burst_len_octets":180,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":2,"sig_level":-3.415499,"noise_level":-16.579226,"freq_skew":2.018384,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":11,"pkt_type_name":"Call Request","chan_group":11,"chan_num":255,"calling_addr":"02400303","facilities":[{"name":"fast_select","value":true},{"name":"called_addr_extension","value":[140,88,65,65,2,0,147]}],"compression_options":19,"compression_algos":["LREF","LREF-CAN"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":30,"net":[71,0,39,65,68,65,72,0,10,0,195,0,0,83,65,65,66,0,0,0]}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853157,"usec":956082},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.071230,"noise_level":-17.713459,"freq_skew":1.991799,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853159,"usec":477504},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.293000,"noise_level":-18.713223,"freq_skew":1.914513,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853160,"usec":242204},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.551908,"noise_level":-18.879198,"freq_skew":0.298956,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":267,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":3,"ack":3,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853172,"usec":420361},"freq":136975000,"burst_len_octets":143,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.756310,"noise_level":-17.182880,"freq_skew":0.199044,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":false,"pdu_type":28,"pdu_type_name":"Data","src_nsap":[71,0,39,65,84,72,89,0,75,170,212,0,1,0,0,0,0,0,1,1],"dst_nsap":[71,0,39,129,131,76,84,0,1,86,67,1,1,0,0,69,83,48,49,1],"lifetime":20.000000,"flags":{"SP":true,"MS":false,"ER":false},"segmentation":{"pdu_id":268,"segment_offset":0,"pdu_total_len":123},"reasm_status":"skipped","options":[{"name":"lref","value":[1]},{"name":"qos_maintenance","value":[214]},{"name":"security","value":{"reg_id":[6,4,43,27,0,0],"sec_info":[{"name":"traffic_type","value":{"type_id":1,"type_name":"ATN operational","category_id":1,"category_name":"ATSC","route_policy":18}}]}},{"name":"priority","value":[8]}],"cotp":{"pdu_list":[{"err":false,"tpdu_code":224,"tpdu_code_descr":"Connect Request","extended":false,"src_ref":3657,"dst_ref":0,"credit":1,"proto_class":4,"options":0,"use_extended_pdu_formats":false,"variable_part_params":[{"name":"tpdu_size","value":1024},{"name":"called_responding_transport_selector","value":[99,109]},{"name":"calling_transport_selector","value":[67,77]},{"name":"priority","value":6},{"name":"additional_options","value":[0]},{"name":"ack_time_ms","value":1000},{"name":"inactivity_timer_ms","value":360000},{"name":"checksum","value":[216,110]},{"name":"atn_checksum","value":[114,230,4,168]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853173,"usec":190268},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.499125,"noise_level":-17.045872,"freq_skew":-0.016453,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853173,"usec":194442},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.732756,"noise_level":-18.131485,"freq_skew":0.082335,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":269,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2053,"credit":1,"rseq":0,"variable_part_params":[{"name":"atn_checksum","value":[93,94,134,241]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853173,"usec":195026},"freq":136975000,"burst_len_octets":118,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.553734,"noise_level":-19.257898,"freq_skew":-0.001461,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":270,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2053,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[23,206,248,34]}]}],"x225_spdu":{"spdu_id":232,"spdu_type":"Short Connect","x227_apdu":{"acse_apdu":{"choice":"aarq","data":{"assoc_request":{"app_ctx_name":[1,3,27,3,1],"ap_title":{"choice":"ap-title-form2","data":{"ap_title_form2":[1,3,27,1,4958932,0]}}}}},"context_mgmt":{"cm_aircraft_message":{"choice":"cmLogonRequest","data":{"atn_context_mgmt_logon_request":{"flight_id":"THY5BK","long_tsap":{"rdp":[65,84,72,89,0],"short_tsap":{"ars":[75,170,212],"loc_sys_nsel_tsel":[0,1,0,0,0,0,0,1,1,67,77]}},"ground_initiated_apps":[{"ae_qualifier_version_address":{"ae_qualifier":22,"version":1,"ap_address":{"choice":"longTsap","data":{"long_tsap":{"rdp":[65,84,72,89,0],"short_tsap":{"ars":[75,170,212],"loc_sys_nsel_tsel":[0,1,0,0,0,0,0,1,1,22,0]}}}}}}],"departure_airport":"EVRA","destination_airport":"LTFM"}}}}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853174,"usec":712836},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.814850,"noise_level":-19.270185,"freq_skew":0.308053,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":3}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853174,"usec":719868},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.850683,"noise_level":-20.207794,"freq_skew":0.272409,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":true,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853174,"usec":721945},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.857942,"noise_level":-20.154581,"freq_skew":0.087053,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":271,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2053,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[208,253,129,225]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853175,"usec":481991},"freq":136975000,"burst_len_octets":123,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.706197,"noise_level":-20.057859,"freq_skew":0.026847,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":20.000000,"flags":246,"pdu_id":272,"cotp":{"pdu_list":[{"err":false,"tpdu_code":128,"tpdu_code_descr":"Disconnect Request","extended":false,"src_ref":3657,"dst_ref":2053,"disc_reason_code":128,"disc_reason":"Normal disconnect","variable_part_params":[{"name":"atn_checksum","value":[229,25,59,0]}],"x225_spm_transport_disconnect_reason_code":1,"x225_spm_transport_disconnect_reason":"OK, transport connection not reused"}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853175,"usec":481991},"freq":136975000,"burst_len_octets":123,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.706197,"noise_level":-20.057859,"freq_skew":0.026847,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":4,"poll":true,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":273,"cotp":{"pdu_list":[{"err":false,"tpdu_code":208,"tpdu_code_descr":"Connect Confirm","extended":false,"src_ref":3658,"dst_ref":2061,"credit":1,"proto_class":4,"options":0,"use_extended_pdu_formats":false,"variable_part_params":[{"name":"tpdu_size","value":1024},{"name":"called_responding_transport_selector","value":[22,0]},{"name":"calling_transport_selector","value":[99,112]},{"name":"priority","value":3},{"name":"ack_time_ms","value":1000},{"name":"inactivity_timer_ms","value":360000},{"name":"additional_options","value":[0]},{"name":"atn_checksum","value":[226,20,97,234]}]}],"x225_spdu":{"spdu_id":240,"spdu_type":"Short Accept","x227_apdu":{"acse_apdu":{"choice":"aare","data":{"assoc_response":{"app_ctx_name":[1,3,27,3,0],"assoc_result":{"value":0,"value_descr":"accept"}}}},"cpdlc":{}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853177,"usec":16211},"freq":136975000,"burst_len_octets":16,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.454728,"noise_level":-19.642614,"freq_skew":0.041038,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Selective Reject","pf":false,"rseq":4,"unknown_proto":{"data":[161,193]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853177,"usec":772941},"freq":136975000,"burst_len_octets":65,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.623149,"noise_level":-20.603239,"freq_skew":0.074063,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":6}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853177,"usec":772941},"freq":136975000,"burst_len_octets":65,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.623149,"noise_level":-20.603239,"freq_skew":0.074063,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":274,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2061,"sseq":0,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[245,208,65,212]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":0,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":52,"sec":53}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"CURRENT DATA AUTHORITY","choice":"dM99NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853180,"usec":59558},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.800114,"noise_level":-20.333860,"freq_skew":0.160917,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Selective Reject","pf":false,"rseq":7,"unknown_proto":{"data":[1]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853180,"usec":63015},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.487339,"noise_level":-21.217096,"freq_skew":0.076764,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":0}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853180,"usec":64762},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.692570,"noise_level":-21.177217,"freq_skew":0.013039,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":275,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2061,"credit":2,"rseq":1,"variable_part_params":[{"name":"atn_checksum","value":[225,143,129,55]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853181,"usec":596452},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.647557,"noise_level":-21.112522,"freq_skew":0.258836,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853183,"usec":123594},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.703545,"noise_level":-21.437464,"freq_skew":-0.001802,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":276,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2061,"credit":2,"rseq":2,"variable_part_params":[{"name":"atn_checksum","value":[55,92,179,225]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853192,"usec":244770},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.663116,"noise_level":-18.632719,"freq_skew":0.941267,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853199,"usec":895050},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.709855,"noise_level":-17.531639,"freq_skew":0.980493,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":754,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":3,"ack":2,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853240,"usec":360909},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.585965,"noise_level":-16.764343,"freq_skew":0.225143,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853241,"usec":947774},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.650563,"noise_level":-17.744629,"freq_skew":0.838067,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853242,"usec":657954},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.581864,"noise_level":-17.493702,"freq_skew":0.598149,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":755,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":5,"variable_part_params":[{"name":"atn_checksum","value":[181,235,214,74]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853243,"usec":424537},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.805250,"noise_level":-17.401245,"freq_skew":0.909011,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":756,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2044,"sseq":3,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[172,200,21,78]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":3,"msg_ref":4,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":54,"sec":1}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853244,"usec":943485},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.757957,"noise_level":-17.233541,"freq_skew":0.974434,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853248,"usec":12139},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.850474,"noise_level":-17.631098,"freq_skew":0.922461,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853248,"usec":776342},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.534363,"noise_level":-18.167152,"freq_skew":0.769460,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":757,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2044,"sseq":4,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[68,62,121,35]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":4,"msg_ref":4,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":54,"sec":7}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853251,"usec":11795},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.483659,"noise_level":-18.589237,"freq_skew":0.780602,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853251,"usec":776591},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.832122,"noise_level":-18.435543,"freq_skew":0.804864,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":758,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":6,"variable_part_params":[{"name":"atn_checksum","value":[11,184,9,244]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853299,"usec":125031},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.436882,"noise_level":-16.894876,"freq_skew":0.036140,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":277,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2061,"credit":2,"rseq":2,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":1,"acked_subseq":0,"acked_credit":2}},{"name":"atn_checksum","value":[160,215,198,72]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853299,"usec":885070},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.622348,"noise_level":-17.054937,"freq_skew":1.642071,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":57,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":4,"ack":2,"credit_offered":3,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853300,"usec":655891},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.536260,"noise_level":-17.829082,"freq_skew":1.626774,"avlc":{"src":{"addr":"0A00C3","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853325,"usec":821203},"freq":136975000,"burst_len_octets":33,"hdr_bits_fixed":0,"octets_corrected_by_fec":2,"idx":0,"sig_level":-5.899389,"noise_level":-16.418245,"freq_skew":2.801780,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":254,"sseq":4,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":68,"priority":11,"lifetime":50.000000,"flags":192,"pdu_id":2816,"cotp":{"pdu_list":[{"err":false,"tpdu_code":192,"tpdu_code_descr":"Disconnect Confirm","extended":false,"src_ref":1,"dst_ref":2032,"variable_part_params":[{"name":"checksum","value":[126,248]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853335,"usec":716167},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.713115,"noise_level":-16.984728,"freq_skew":0.046347,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853349,"usec":471357},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.303398,"noise_level":-16.963606,"freq_skew":2.076375,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":4,"sseq":2,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":183,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":5,"ack":3,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853350,"usec":191484},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.126283,"noise_level":-17.714613,"freq_skew":1.949641,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853350,"usec":949190},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":1,"octets_corrected_by_fec":1,"idx":0,"sig_level":-6.128346,"noise_level":-17.687948,"freq_skew":-0.868613,"avlc":{"src":{"addr":"781DE5","type":"Aircraft","status":"Airborne"},"dst":{"addr":"109CFA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853370,"usec":11685},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.107484,"noise_level":-16.832794,"freq_skew":0.562055,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":759,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":6,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":5,"acked_subseq":0,"acked_credit":3}},{"name":"atn_checksum","value":[226,186,39,86]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853373,"usec":783744},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.183669,"noise_level":-18.769905,"freq_skew":0.355138,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":759,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":6,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":5,"acked_subseq":0,"acked_credit":3}},{"name":"atn_checksum","value":[226,186,39,86]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853395,"usec":896858},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.223833,"noise_level":-17.539949,"freq_skew":0.064191,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":6}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853395,"usec":899016},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.694980,"noise_level":-17.822485,"freq_skew":-0.214765,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":6,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":3}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853410,"usec":372979},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.061618,"noise_level":-16.702496,"freq_skew":1.569637,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":2}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853413,"usec":428557},"freq":136975000,"burst_len_octets":59,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.700637,"noise_level":-17.459461,"freq_skew":1.716056,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"U","cmd":"XID","pf":true,"xid":{"err":false,"type":"XID_RSP_HO","type_descr":"Handoff Response","pub_params":[{"name":"param_set_id","value":"8885:1993"},{"name":"procedure_classes","value":[0,1]},{"name":"hdlc_options","value":[32,164,136]}],"vdl_params":[{"name":"param_set_id","value":"V"},{"name":"conn_mgmt","value":5},{"name":"xid_sequencing","value":{"seq":1,"retry":0}},{"name":"avlc_specific_options","value":[37]},{"name":"dst_airport","value":"EVRA"}]}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853413,"usec":430639},"freq":136975000,"burst_len_octets":122,"hdr_bits_fixed":1,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.134745,"noise_level":-17.433567,"freq_skew":1.935412,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":11,"pkt_type_name":"Call Request","chan_group":11,"chan_num":255,"calling_addr":"24026625","facilities":[{"name":"max_pkt_size","value":{"from_calling_dte":1024,"from_called_dte":1024}},{"name":"window_size","value":{"from_calling_dte":4,"from_called_dte":4}},{"name":"fast_select","value":true},{"name":"called_addr_extension","value":[140,88,65,65,2,0,147]}],"compression_options":19,"compression_algos":["LREF","LREF-CAN"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":30,"net":[71,0,39,65,66,84,73,0,80,45,149,0,1,0,0,0,0,0,1,0]}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853413,"usec":430639},"freq":136975000,"burst_len_octets":122,"hdr_bits_fixed":1,"octets_corrected_by_fec":0,"idx":1,"sig_level":-5.134745,"noise_level":-17.433567,"freq_skew":1.935412,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YL-ABV","mode":"2","label":"Q0","blk_id":"9","ack":"!","flight":"BT0272","msg_num":"S74","msg_num_seq":"A","msg_text":""}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853415,"usec":18786},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-6.055817,"noise_level":-17.482607,"freq_skew":1.857936,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853415,"usec":715744},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.971789,"noise_level":-17.500277,"freq_skew":1.631956,"avlc":{"src":{"addr":"502D95","type":"Aircraft","status":"Airborne"},"dst":{"addr":"10933A","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853417,"usec":966924},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.772590,"noise_level":-17.359303,"freq_skew":-0.210490,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":6,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":6,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":278,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2061,"credit":2,"rseq":2,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":1,"acked_subseq":0,"acked_credit":2}},{"name":"atn_checksum","value":[160,215,198,72]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853459,"usec":908395},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.470262,"noise_level":-17.106483,"freq_skew":-0.195195,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":7,"sseq":7,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":7,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":279,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":3,"ack":3,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853461,"usec":434237},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-3.500343,"noise_level":-18.473585,"freq_skew":-0.246526,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853475,"usec":908993},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.375448,"noise_level":-17.439310,"freq_skew":-0.109540,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853476,"usec":666949},"freq":136975000,"burst_len_octets":83,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.096887,"noise_level":-18.220947,"freq_skew":-0.202536,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":0,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":280,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2061,"credit":2,"rseq":3,"variable_part_params":[{"name":"atn_checksum","value":[140,41,229,140]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853476,"usec":666949},"freq":136975000,"burst_len_octets":83,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":1,"sig_level":-4.096887,"noise_level":-18.220947,"freq_skew":-0.202536,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":1,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":281,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2061,"sseq":1,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[101,247,175,33]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":1,"msg_ref":2,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":57,"sec":54}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853477,"usec":438385},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.258483,"noise_level":-19.151646,"freq_skew":-0.232000,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853480,"usec":439115},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.213171,"noise_level":-19.118307,"freq_skew":-0.238227,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853488,"usec":85143},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.333022,"noise_level":-18.178633,"freq_skew":-0.109423,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":2,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":282,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":2061,"sseq":2,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[126,152,153,204]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":2,"msg_ref":2,"timestamp":{"date":{"year":2026,"month":1,"day":31},"time":{"hour":9,"min":58,"sec":5}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853489,"usec":617103},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.035814,"noise_level":-18.766094,"freq_skew":-0.218139,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":4}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853490,"usec":376427},"freq":136975000,"burst_len_octets":55,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.309878,"noise_level":-19.467903,"freq_skew":0.340494,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":1,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":4,"rseq":4,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":760,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":6,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":5,"acked_subseq":0,"acked_credit":3}},{"name":"atn_checksum","value":[226,186,39,86]}]},{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2044,"credit":3,"rseq":6,"variable_part_params":[{"name":"atn_checksum","value":[11,184,9,244]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853490,"usec":384579},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.535996,"noise_level":-19.588221,"freq_skew":-0.231029,"avlc":{"src":{"addr":"4BAAD4","type":"Aircraft","status":"Airborne"},"dst":{"addr":"292717","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":4,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":3,"rseq":7,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":283,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":2061,"credit":3,"rseq":4,"variable_part_params":[{"name":"atn_checksum","value":[0,200,224,124]}]}]}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853491,"usec":149746},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.849052,"noise_level":-19.580976,"freq_skew":0.471527,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853491,"usec":963913},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.487029,"noise_level":-19.465866,"freq_skew":0.393448,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":1,"pkt_type_name":"Receive Ready","chan_group":11,"chan_num":255,"rseq":6}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853500,"usec":263026},"freq":136975000,"burst_len_octets":53,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.742742,"noise_level":-17.810856,"freq_skew":0.408769,"avlc":{"src":{"addr":"502CD7","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":11,"chan_num":255,"sseq":5,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":64,"priority":14,"lifetime":20.000000,"flags":246,"pdu_id":761,"idrp":{"err":false,"pdu_type":4,"pdu_type_name":"Keepalive","seq":3,"ack":2,"credit_offered":32,"credit_avail":4}}}}}} {"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0"},"t":{"sec":1769853511,"usec":675013},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-6.284918,"noise_level":-17.308773,"freq_skew":2.536429,"avlc":{"src":{"addr":"4CADFF","type":"Aircraft","status":"Airborne"},"dst":{"addr":"1094FA","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}}