{"analysis":{"blocks":[[0.0,"carrier",3155.3],[20.0,"carrier",3155.3],[40.0,"carrier",3155.3],[60.0,"carrier",3155.3],[80.0,"carrier",3155.3],[100.0,"carrier",3155.3],[120.0,"carrier",3155.3],[140.0,"carrier",3155.3],[160.0,"carrier",3155.3],[180.0,"carrier",3155.3],[200.0,"carrier",3155.3],[220.0,"carrier",3155.3],[240.0,"carrier",3155.3],[260.0,"carrier",3155.3],[280.0,"carrier",3155.3],[300.0,"keyed-tone",3155.3],[320.0,"carrier",3155.3],[340.0,"carrier",3155.3],[360.0,"keyed-tone",3155.3],[380.0,"carrier",3155.3],[400.0,"keyed-tone",3155.3],[420.0,"carrier",3155.3],[440.0,"carrier",3155.3],[460.0,"keyed-tone",3155.3],[480.0,"carrier",3155.3],[500.0,"carrier",3155.3],[520.0,"carrier",3155.3],[540.0,"keyed-tone",3155.3],[560.0,"carrier",3155.3],[580.0,"keyed-tone",3155.3]],"content":"carrier","dur_s":600.04,"keying_depth":0.57,"keying_hz":0.23,"mix":{"carrier":0.8,"keyed-tone":0.2},"peak":1.0,"rms":0.036084,"samplerate":12000,"summary":"carrier 80% · keyed-tone 20% · tone 3155 Hz · keying 0.23 Hz depth 0.57","tone_hz":3155.3},"archived":false,"archived_why":null,"band":"LF","dur_s":600.04,"excerpt_s":null,"freq_khz":28.7,"heard_in":[],"id":"2026-10-02T0844Z-28.7-vlf-28700","licence":"CC BY 4.0","media":{"flac":{"bytes":10233237,"url":"/media/b1f124054a5e983c0e1bbda057fb5c17a3848dc859a758187f738b9ccbe39721.flac"},"m4a":{"bytes":3637173,"url":"/media/b1f124054a5e983c0e1bbda057fb5c17a3848dc859a758187f738b9ccbe39721.m4a"},"opus":{"bytes":2330971,"url":"/media/b1f124054a5e983c0e1bbda057fb5c17a3848dc859a758187f738b9ccbe39721.opus"}},"mode":"USB","notes":{"listening":{"marks":[],"note":"","stars":0,"tags":[]},"rig":null},"peaks":[58,91,99,98,98,98,98,98,98,98,99,98,99,99,99,99,99,99,99,99,99,98,98,98,98,98,96,94,98,98,98,99,99,98,98,98,98,99,99,99,99,99,99,99,99,98,95,99,99,99,99,99,98,98,98,98,98,98,98,98,98,98,98,98,98,99,98,98,99,99,99,98,98,94,99,99,99,99,99,99,99,99,99,99,99,99,99,99,98,98,98,98,93,98,98,99,98,99,98,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,98,98,98,99,94,99,99,99,99,99,99,99,99,99,99,99,99,98,98,98,99,99,99,93,99,99,99,98,99,99,99,99,99,99,99,98,99,98,98,98,98,99,98,99,99,99,98,99,99,99,94,98,99,99,99,99,100,99,99,99,99,99,99,83,98,99,98,98,98,95,97,98,98,99,99,98,98,99,98,99,99,99,99,99,99,99,99,99,99,99,99,99,98,99,98,98,96,97,99,99,99,99,99,99,99,99,98,99,99,99,99,99,99,99,99,97,97,99,99,99,99,99,99,98,99,98,98,98,98,93,98,98,99,99,99,99,98,98,98,98,98,99,99,99,98,99,99,99,99,99,99,98,99,99,99,99,94,98,99,99,99,99,99,99,99,99,97,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,95,95,93,98,99,98,98,97,96,94,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,96,94,95,92,98,98,98,96,95,95,95,95,95,95,95,95,95,95,95,95,95,95,95,95,95,95,95,95,96,95,95,94,95,91,98,99,98,97,95,96,96,95,95,96,96,96,96,96,96,96,96,96,96,96,97,97,96,96,96,96,96,96,95,95,94,97,99,99,99,97,95,95,95,95,95,96,96,96,96,96,96,92,92,92,96,98,98,99,99,95,95,96,96,95,95,95,95,95,95,95,95,96,96,96,96,96,96,96,96,97,97,96,95,95,98,99,99,99,96,96,96,96,96,96,96,96,96,96,97,96,96,97,97,96,97,97,97,96,97,96,96,96,96,94,98,99,98,97,95,96,95,96,96,96,96,96,97,96,96,96,96,95,95,96,95,95,96,96,96,96,96,95,94,94,97,99,99,98,98,95,96,95,95,96,97,96,96,96,96,96,97,97,97,97,97,96,97,96,96,96,96,96,96,96,96,96,96,96,96,96,97,97,95,93,92,95,91,98,98,98,98,95,95,95,95,95,96,96,96,97,96,96,96,96,96,96,95,95,96,96,96,96,95,95,96,94,94,93,97,98,99,98,95,95,95,95,96,96,96,96,96,96,96,96,96],"publish":"full","receiver":{"antenna":"Longwire 54m top 70m above sealevel","grid":"JO21oc","loc":"Heppen, Limburg, Belgium","opt_out":false},"recorder":"kiwirecorder.py (jks-prv/kiwiclient v1.11)","related":["2026-10-02T0139Z-28.7-vlf-28700","2026-10-02T2112Z-28.7-vlf-28700","2026-10-03T0322Z-28.7-vlf-28700","2026-10-02T0837Z-8888-volmet-8888-novosibirsk","2026-10-02T0856Z-59-msf-60","2026-10-02T0824Z-23-vlf-23000"],"rig_item":"2026-10-02T0844Z-28.7-vlf-28700","sha256":"b1f124054a5e983c0e1bbda057fb5c17a3848dc859a758187f738b9ccbe39721","snr_db":31,"source_dur_s":600.04,"spectrogram":"/spectrogram/b1f124054a5e983c0e1bbda057fb5c17a3848dc859a758187f738b9ccbe39721.png","station":{"kind":"","name":"VLF Israel 29.7 kHz submarine broadcast","slug":"vlf-28700"},"thumb":"/spectrogram/b1f124054a5e983c0e1bbda057fb5c17a3848dc859a758187f738b9ccbe39721-thumb.png","tier":"A","url":"/capture/2026-10-02T0844Z-28.7-vlf-28700/","utc":"2026-10-02T08:44:13Z"}