USER ALERT: CDDIS is currently migrating our website from cddis.nasa.gov to earthdata.nasa.gov, which is scheduled to be complete in June 2025. CDDIS is also migrating our FAQ from cddis.nasa.gov to forum.earthdata.nasa.gov during the first week of May 2025. For more information, please see the following web page (https://cddis.nasa.gov/Web_Unification.html)

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CDDIS: NASA's Archive of Space Geodesy Data
Data and derived products overview

The CDDIS archives and distributes mainly Global Navigation Satellite System (GNSS), laser ranging (both to artificial satellites, SLR, and the moon, LLR, Very Long Baseline Interferometry (VLBI), and Doppler Orbitography and Radio-positioning Integrated by Satellite (DORIS) data for an ever increasing user community of geophysicists. CDDIS data and derived products are accessible at https://cddis.nasa.gov/archive and via other methods.

GNSS antenna
NGSLR site at GGAO
VLBI2010 antenna
DORIS antenna