{
  "schema": 1,
  "date": "2026-10-24",
  "mode": "VARA HF",
  "application": "VarAC",
  "reception": "passive",
  "bandwidth_hz": 500,
  "slot": 1,
  "receiver_dial_hz": 14105000,
  "rf_endpoints": null,
  "duration_s": 125,
  "sample_rate": 48000,
  "channels": 1,
  "samples": 6000000,
  "source_session": "20261024T153733654022Z",
  "source_first_sample": 37500000,
  "source_last_sample": 43500000,
  "pcm_sha256": "820a8aa70426bb211cc78fc759541f5498de8c728a288ec126a75acd65ab68f7",
  "audio": "audio/receiver.flac",
  "audio_sha256": "17c559926de09821ac0d335423a8783332c795331dadcf1200f7301e480b5c9a",
  "decoded_frames": [
    {
      "level": 6,
      "crc": "pass",
      "start_s": 25.1,
      "end_s": 29.18,
      "frame_sha256": "03443f9657c91267b73c3f029250c30e396d208fa12b081e36ec39fe81b102a3"
    },
    {
      "level": 7,
      "crc": "pass",
      "start_s": 30.62,
      "end_s": 34.26,
      "frame_sha256": "2b00555d1275a61a253d8457b70ca7367158c0d0eeefa7519fa77a25543c0681"
    },
    {
      "level": 6,
      "crc": "pass",
      "start_s": 35.7,
      "end_s": 39.6,
      "frame_sha256": "1aa3d4e221f2bdc727c233acb6f8dc71c655600d50939904c8804e44761f860b"
    },
    {
      "level": 5,
      "crc": "pass",
      "start_s": 41.88,
      "end_s": 46.12,
      "frame_sha256": "ac2905ef36437981f9bdc873b3f0ddfbb86f96960a3646d4650b9476e369df79"
    }
  ],
  "result": "CRC-valid L6, L7, L6 and L5 frames carrying TEXT-compressed forwarded VMail fragments.",
  "limits": [
    "RF endpoints are unknown; embedded message authors do not identify the transmitting station.",
    "Partial passive reception; no complete-message delivery or local transmit result is claimed."
  ],
  "timing": "Start and end of each detected emission, in seconds from the first recording sample; 20 ms detection resolution."
}