{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743695,"usec":521564},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.588918,"noise_level":-16.555473,"freq_skew":-1.762768,"avlc":{"src":{"addr":"896463","type":"Aircraft","status":"Airborne"},"dst":{"addr":"262257","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":0,"rseq":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":70,"priority":11,"lifetime":32.000000,"flags":246,"pdu_id":1890,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48230,"credit":3,"rseq":5,"variable_part_params":[{"name":"flow_control","value":{"acked_tpdu_nr":4,"acked_subseq":0,"acked_credit":10}},{"name":"atn_checksum","value":[251,237,204,170]}]}]}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743714,"usec":809654},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.781694,"noise_level":-18.052422,"freq_skew":-1.812923,"avlc":{"src":{"addr":"896463","type":"Aircraft","status":"Airborne"},"dst":{"addr":"262257","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":7}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743720,"usec":923720},"freq":136975000,"burst_len_octets":37,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.273001,"noise_level":-17.181356,"freq_skew":0.273026,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":4,"chan_num":4,"sseq":6,"rseq":3,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":1,"priority":8,"lifetime":127.000000,"flags":224,"pdu_id":32,"cotp":{"pdu_list":[{"err":false,"tpdu_code":128,"tpdu_code_descr":"Disconnect Request","extended":false,"src_ref":1357,"dst_ref":0,"disc_reason_code":128,"disc_reason":"Normal disconnect","variable_part_params":[{"name":"atn_checksum","value":[90,93,115,116]}],"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-cd31c2d"},"t":{"sec":1770743725,"usec":550088},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.511298,"noise_level":-16.671024,"freq_skew":0.427535,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743729,"usec":371862},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.383143,"noise_level":-16.175465,"freq_skew":0.519042,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","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":4,"chan_num":4,"sseq":7,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":127.000000,"flags":224,"pdu_id":33,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":48309,"sseq":5,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[159,40,182,31]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":5,"msg_ref":7,"timestamp":{"date":{"year":2026,"month":2,"day":10},"time":{"hour":17,"min":15,"sec":29}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743729,"usec":372133},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.379738,"noise_level":-16.175465,"freq_skew":0.196558,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","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":4,"chan_num":4,"sseq":0,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":127.000000,"flags":224,"pdu_id":34,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48309,"credit":3,"rseq":7,"variable_part_params":[{"name":"atn_checksum","value":[197,43,147,85]}]}]}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743734,"usec":87073},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.815883,"noise_level":-16.407736,"freq_skew":0.308187,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743734,"usec":845804},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-6.055992,"noise_level":-17.450241,"freq_skew":0.281917,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","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":4,"chan_num":4,"sseq":0,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":127.000000,"flags":224,"pdu_id":34,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48309,"credit":3,"rseq":7,"variable_part_params":[{"name":"atn_checksum","value":[197,43,147,85]}]}]}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743736,"usec":346519},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.823362,"noise_level":-17.307413,"freq_skew":0.174807,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743742,"usec":438737},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.179212,"noise_level":-17.533602,"freq_skew":0.251296,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","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":4,"chan_num":4,"sseq":0,"rseq":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":127.000000,"flags":224,"pdu_id":34,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48309,"credit":3,"rseq":7,"variable_part_params":[{"name":"atn_checksum","value":[197,43,147,85]}]}]}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743742,"usec":441057},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.350807,"noise_level":-17.862293,"freq_skew":0.251413,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":3,"sseq":3,"poll":false,"x25":{"err":false,"pkt_type":0,"pkt_type_name":"Data","chan_group":4,"chan_num":4,"sseq":1,"rseq":6,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":127.000000,"flags":224,"pdu_id":35,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":48309,"sseq":6,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[119,141,41,27]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":6,"msg_ref":7,"timestamp":{"date":{"year":2026,"month":2,"day":10},"time":{"hour":17,"min":15,"sec":41}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743743,"usec":205567},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":2,"idx":0,"sig_level":-5.379079,"noise_level":-17.734211,"freq_skew":0.284674,"avlc":{"src":{"addr":"494142","type":"Aircraft","status":"Airborne"},"dst":{"addr":"225677","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":4,"chan_num":4,"sseq":2,"rseq":0,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":127.000000,"flags":224,"pdu_id":36,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48309,"credit":3,"rseq":8,"variable_part_params":[{"name":"atn_checksum","value":[27,247,197,0]}]}]}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743743,"usec":963314},"freq":136975000,"burst_len_octets":65,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.935651,"noise_level":-17.830235,"freq_skew":-2.724747,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","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":[32,164,128]}],"vdl_params":[{"name":"param_set_id","value":"V"},{"name":"conn_mgmt","value":1},{"name":"xid_sequencing","value":{"seq":1,"retry":0}},{"name":"avlc_specific_options","value":[37]},{"name":"dst_airport","value":"LIRF"},{"name":"ac_location","value":{"loc":{"lat":52.000000,"lon":5.600000},"alt":19000}}]}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743744,"usec":729688},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.756984,"noise_level":-17.796471,"freq_skew":-2.677346,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":0,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".EI-DTB","mode":"2","label":"Q0","blk_id":"2","ack":"!","flight":"AZ0109","msg_num":"S51","msg_num_seq":"A","msg_text":""}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743744,"usec":734655},"freq":136975000,"burst_len_octets":74,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.986149,"noise_level":-18.706936,"freq_skew":-2.621519,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","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":"23123603","facilities":[{"name":"fast_select","value":true},{"name":"called_addr_extension","value":[140,83,73,84,0,0,1]}],"compression_options":19,"compression_algos":["LREF","LREF-CAN"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":30,"net":[71,0,39,65,73,84,89,0,76,167,131,0,0,83,65,65,66,0,0,0]}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743745,"usec":486104},"freq":136975000,"burst_len_octets":54,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.501971,"noise_level":-18.573248,"freq_skew":-2.831747,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":2,"sseq":2,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".EI-DTB","mode":"2","label":"SA","blk_id":"3","ack":"!","flight":"AZ0109","msg_num":"S52","msg_num_seq":"A","msg_text":"0EV171542V","media-adv":{"err":false,"version":0,"current_link":{"code":"V","descr":"VHF ACARS","established":true,"time":{"hour":17,"min":15,"sec":42}},"links_avail":[{"code":"V","descr":"VHF ACARS"}]}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743746,"usec":303146},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.233860,"noise_level":-18.290461,"freq_skew":-2.496940,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":3}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743750,"usec":87926},"freq":136975000,"burst_len_octets":62,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.813475,"noise_level":-18.282555,"freq_skew":-2.533540,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","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":1,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":170,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48356,"credit":2,"rseq":3,"variable_part_params":[{"name":"atn_checksum","value":[154,199,120,200]}]},{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":48356,"sseq":1,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[164,108,199,243]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":1,"msg_ref":3,"timestamp":{"date":{"year":2026,"month":2,"day":10},"time":{"hour":17,"min":15,"sec":48}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743750,"usec":845835},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.755848,"noise_level":-18.036602,"freq_skew":-2.585289,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":5}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743754,"usec":666222},"freq":136975000,"burst_len_octets":51,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.788116,"noise_level":-18.582811,"freq_skew":-2.462411,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","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":1,"rseq":2,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":171,"cotp":{"pdu_list":[{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":48356,"sseq":2,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[236,22,128,16]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":2,"msg_ref":3,"timestamp":{"date":{"year":2026,"month":2,"day":10},"time":{"hour":17,"min":15,"sec":52}},"logical_ack":"required"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"WILCO","choice":"dM0NULL","data":{}}}]}}}}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743755,"usec":411115},"freq":136975000,"burst_len_octets":17,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.507781,"noise_level":-18.692165,"freq_skew":-2.819040,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":5,"sseq":7,"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-cd31c2d"},"t":{"sec":1770743756,"usec":161692},"freq":136975000,"burst_len_octets":34,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.882215,"noise_level":-18.691757,"freq_skew":-2.791587,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","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":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":172,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48356,"credit":3,"rseq":4,"variable_part_params":[{"name":"atn_checksum","value":[14,103,115,184]}]}]}}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743804,"usec":779196},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.228985,"noise_level":-18.084040,"freq_skew":0.300338,"avlc":{"src":{"addr":"4A08EB","type":"Aircraft","status":"Airborne"},"dst":{"addr":"2335E5","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":0}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743806,"usec":355869},"freq":136975000,"burst_len_octets":80,"hdr_bits_fixed":0,"octets_corrected_by_fec":2,"idx":0,"sig_level":-5.247625,"noise_level":-18.188148,"freq_skew":0.164249,"avlc":{"src":{"addr":"4A08EB","type":"Aircraft","status":"Airborne"},"dst":{"addr":"20B677","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":"22404353","facilities":[{"name":"fast_select","value":true},{"name":"max_pkt_size","value":{"from_calling_dte":128,"from_called_dte":128}},{"name":"window_size","value":{"from_calling_dte":7,"from_called_dte":7}},{"name":"called_addr_extension","value":[140,83,73,84,0,0,1]}],"compression_options":18,"compression_algos":["LREF"],"esis":{"err":false,"pdu_type":4,"pdu_type_name":"IS Hello","hold_time":180,"net":[71,0,39,65,82,79,82,0,74,8,235,0,0,0,0,0,0,0,1,0]}}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743807,"usec":87177},"freq":136975000,"burst_len_octets":44,"hdr_bits_fixed":0,"octets_corrected_by_fec":1,"idx":0,"sig_level":-5.229142,"noise_level":-18.128696,"freq_skew":0.195653,"avlc":{"src":{"addr":"4A08EB","type":"Aircraft","status":"Airborne"},"dst":{"addr":"20B677","type":"Ground station"},"cr":"Command","frame_type":"I","rseq":1,"sseq":0,"poll":false,"acars":{"err":false,"crc_ok":true,"more":false,"reg":".YR-BGK","mode":"2","label":"Q0","blk_id":"4","ack":"!","flight":"ROT363","msg_num":"S29","msg_num_seq":"A","msg_text":""}}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743807,"usec":858592},"freq":136975000,"burst_len_octets":14,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.100191,"noise_level":-18.340446,"freq_skew":0.422051,"avlc":{"src":{"addr":"4A08EB","type":"Aircraft","status":"Airborne"},"dst":{"addr":"20B677","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":1}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743808,"usec":626672},"freq":136975000,"burst_len_octets":13,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-5.231019,"noise_level":-18.120811,"freq_skew":0.232360,"avlc":{"src":{"addr":"4A08EB","type":"Aircraft","status":"Airborne"},"dst":{"addr":"20B677","type":"Ground station"},"cr":"Response","frame_type":"S","cmd":"Receive Ready","pf":false,"rseq":2}}}
{"vdl2":{"app":{"name":"dumpvdl2","ver":"2.3.0-cd31c2d"},"t":{"sec":1770743813,"usec":953914},"freq":136975000,"burst_len_octets":62,"hdr_bits_fixed":0,"octets_corrected_by_fec":0,"idx":0,"sig_level":-4.970475,"noise_level":-18.192312,"freq_skew":-2.859218,"avlc":{"src":{"addr":"4CA783","type":"Aircraft","status":"Airborne"},"dst":{"addr":"219DD7","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":5,"more":false,"reasm_status":"skipped","clnp":{"err":false,"compressed":true,"local_ref_a":66,"priority":11,"lifetime":20.000000,"flags":246,"pdu_id":173,"cotp":{"pdu_list":[{"err":false,"tpdu_code":96,"tpdu_code_descr":"Data Ack","extended":false,"dst_ref":48356,"credit":3,"rseq":5,"variable_part_params":[{"name":"atn_checksum","value":[99,52,165,99]}]},{"err":false,"tpdu_code":240,"tpdu_code_descr":"Data","extended":false,"dst_ref":48356,"sseq":3,"req_of_ack":0,"eot":1,"reasm_status":"skipped","variable_part_params":[{"name":"atn_checksum","value":[36,130,134,75]}]}],"cpdlc":{"atc_downlink_message":{"header":{"msg_id":3,"msg_ref":5,"timestamp":{"date":{"year":2026,"month":2,"day":10},"time":{"hour":17,"min":16,"sec":52}},"logical_ack":"notRequired"},"msg_data":{"msg_elements":[{"msg_element":{"choice_label":"LOGICAL ACKNOWLEDGMENT","choice":"dM100NULL","data":{}}}]}}}}}}}}}