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Attention GNSS Data Users: Please review the IGSMail messages related to the "Transition to ISO-3166 Alpha-3 codes in the IGS metadata." The changes go into effect on December 4, 2024. See https://lists.igs.org/pipermail/igsmail/2024/008454.html and https://lists.igs.org/pipermail/igsmail/2024/008518.html.

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CDDIS: NASA's Archive of Space Geodesy Data
On-board receiver data

The CDDIS began archiving data from flight receivers on board LEO satellites in support of the IGS LEO Working Group. Satellite data available in this archive include CHAMP, ICESat-1, Jason-1, and 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:

SATNAME/YYYY/DDD/SSSSDDD0.YYt.Z

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Satellite Name
champ
icesat
jason
sac-c

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Satellite NameCode
champcham
icesatice1
jasonjaso
sac-csacc

as described in the table below.

Code Meaning
SATNAME satellite name
YYYY4-digit year
DDD3-digit day of year
SSSSsatellite code
YY2-digit year
ttype of data:

d = Hatanaka-compressed observation data
s = observation summary files (output of TEQC)
o = ICESat GPS data in standard RINEX format
pc = ICESat position solution from receiver
.Z UNIX compressed file