mix gnss.broadcast_diff (Orbis v0.15.1)

Copy Markdown View Source

Report broadcast-ephemeris accuracy: the orbit and clock differences between a RINEX broadcast navigation product and a precise SP3 product, per satellite and overall (3D plus radial / along-track / cross-track RMS and max). This is the command-line front end for Orbis.GNSS.BroadcastComparison.

mix gnss.broadcast_diff --nav BRDC.rnx --sp3 igs.sp3 \
  --from 2020-06-25T00:15:00 --to 2020-06-25T05:45:00

Options:

  • --nav (required) - path to the RINEX broadcast navigation file.
  • --sp3 (required) - path to the precise SP3 product for the same day.
  • --from / --to (required) - ISO 8601 naive datetimes in GPST bounding the comparison window.
  • --step - sample step in seconds (default 300).
  • --system - constellation letter to compare, e.g. G, E, C (default G).

Expected GPS LNAV vs IGS precise agreement is ~1-2 m orbit RMS; a result far outside that band points to a parse/eval defect. The broadcast models follow IS-GPS-200 (GPS LNAV), the Galileo OS-SIS-ICD, and the BeiDou BDS-SIS-ICD.