USER ALERT: CDDIS will be migrating our website from cddis.nasa.gov to earthdata.nasa.gov starting in February 2025 and ending in June 2025. For more information, please see the following web page (https://cddis.nasa.gov/Web_Unification.html)

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.

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
Satellite Name |
---|
champ |
icesat |
jason |
sac-c |
Satellite Name | Code |
---|---|
champ | cham |
icesat | ice1 |
jason | jaso |
sac-c | sacc |
as described in the table below.
Code | Meaning |
---|---|
SATNAME | satellite name |
YYYY | 4-digit year |
DDD | 3-digit day of year |
SSSS | satellite code |
YY | 2-digit year |
t | type 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 |
