The CDDIS archives and distributes mainly Global Positioning System (GPS), GLObal NAvigation Satellite System (GLONASS), 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 geophysists.

To learn more about the CDDIS data holdings of these space geodetic techniques, click on the images below. The CDDIS Site and Data Locator page lists maps of space geodesy site locations and data availability queries for the CDDIS data archive. A description of the structure of the CDDIS ftp archive is also available.

GNSS (GPS and GLONASS)	SLR	VLBI	DORIS