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On-Board GNSS Receiver Data

Access Global Navigation Satellite System (GNSS) data from flight receivers aboard low Earth orbit (LEO) satellites.

NASA’s Crustal Dynamics Data Information System (CDDIS) began archiving data from flight receivers aboard low Earth orbit (LEO) satellites in support of the IGS LEO Working Group. Satellite data available in this archive include Challenging Minisatellite Payload (CHAMP), Ice, Cloud,and land Elevation Satellite-1 (ICESat-1), Jason-1, and Satellite for Scientific Applications-C (SAC-C). All flight receiver data are stored in RINEX format.

The starting directory for these files is:

Append the following directory and file names to the starting directory:

File Naming ConventionSATNAME/YYYY/DDD/SSSSDDD0.YYt.Z

as described in the table below.

CodeMeaning
SATNAMEsatellite name (champ, icesat, jason, or sac-c)
YYYY4-digit year
DDD3-digit day of year
SSSSsatellite code (cham, ice1, jaso, or sacc)
YY2-digit year
ttype of data:
dHatanaka-compressed observation data
sobservation summary files (output of TEQC)
oICESat GPS data in standard RINEX format
pcICESat position solution from receiver
.ZUNIX compressed file