{
  "schema_note": "Working observation card; null marks a field to fill in. This is not a SigMF file.",
  "utc_start": null,
  "utc_end": null,
  "satellite": null,
  "norad_id": null,
  "orbital_elements_source": null,
  "orbital_elements_epoch": null,
  "station_latitude_deg": null,
  "station_longitude_deg": null,
  "station_altitude_m": null,
  "receiver_model": null,
  "antenna": null,
  "polarization": null,
  "rf_chain": [],
  "center_frequency_hz": null,
  "sample_rate_sps": null,
  "iq_format": null,
  "endianness": null,
  "iq_order": null,
  "gain_db": null,
  "ppm_correction": null,
  "software_version": null,
  "decoder_pipeline": null,
  "recording_filename": null,
  "sha256": null,
  "decoded_frames": null,
  "notes": null
}