{
  "schema": 1,
  "date": "2026-09-29",
  "mode": "PACTOR-4",
  "station": "W9SSJ",
  "peer": "VE3KPG",
  "peer_grid": "FN04VE",
  "band_m": 40,
  "dial_hz": 7089500,
  "centre_hz": 7091000,
  "rig_mode": "PKTUSB 3000",
  "tx_power_setting_w": 50,
  "started_utc": "2026-09-29T15:24:49Z",
  "recorded_from": "Station receive stream, on the sample clock the session log uses",
  "software": "63b912a7 with uncommitted changes",
  "source_session": "onair-0929-1024",
  "source_sha256": "4eb020a5e1706349253832e2da2b257eecf1c0c12a2074f2342a507d0d744f4d",
  "excerpt": "Whole recording; no cut. Re-encoded to FLAC without the source container metadata.",
  "audio": "audio/receiver.flac",
  "audio_sha256": "e8eede4ab40838e1519ecafe9dadd48009a5177053d84f0ca36030d543dfa5f7",
  "pcm_sha256": "de7cc472e57c7479911571e7eadae4e0c2cc17aa59565c6ceacaa69f1e5a4f61",
  "sample_rate": 48000,
  "channels": 1,
  "bits_per_sample": 16,
  "samples": 5578752,
  "duration_s": 116.224,
  "lost_samples": 0,
  "witness": null,
  "timing": "Seconds from the first recording sample, as logged by the live receiver.",
  "decoded_frames": [
    {"at_s": 30.999, "family": "break-in body after Y27", "status": "0x00", "counter": 0, "data_bytes": 31, "crc": "valid"},
    {"at_s": 55.999, "family": "robust long", "speed_level": 2, "status": "0x61", "counter": 1, "data_bytes": 40, "crc": "valid"},
    {"at_s": 59.749, "family": "robust long", "speed_level": 2, "status": "0x62", "counter": 2, "data_bytes": 40, "crc": "valid"},
    {"at_s": 63.499, "family": "robust long", "speed_level": 3, "status": "0x03", "counter": 3, "data_bytes": 69, "crc": "valid"},
    {"at_s": 67.249, "family": "robust long", "speed_level": 3, "status": "0x03", "counter": 3, "crc": "valid", "note": "repeat of counter 3"},
    {"at_s": 70.999, "family": "robust long", "speed_level": 3, "status": "0x40", "corrected_bits": 1, "crc": "valid", "note": "idle"},
    {"at_s": 85.999, "family": "robust long", "speed_level": 3, "status": "0x40", "corrected_bits": 3, "crc": "valid", "note": "idle"},
    {"at_s": 89.749, "family": "robust long", "speed_level": 3, "status": "0x40", "crc": "valid", "note": "idle"},
    {"at_s": 100.349, "family": "break-in body after Y27", "status": "0x40", "crc": "valid", "note": "idle"}
  ],
  "result": "PACTOR-4 entry and a robust SL2/SL3 ladder from VE3KPG; the complete gateway greeting decoded; this station's first data turn drew one changeover answer and was then unanswered.",
  "limits": [
    "No B2F login, proposal or message is known to have reached the gateway; the session ended with the local retry budget exhausted.",
    "Peer counters advancing 0 to 3 imply that the gateway accepted this station's acknowledgements; no peer-side record confirms it.",
    "No witness recording; this station's transmit intervals come from the session log.",
    "The 50 W figure is the rig power setting, not measured RF output."
  ]
}