On 31 October 2020, anonymous ftp access will officially be discontinued at CDDIS. Beginning July 1, 2020, CDDIS will bandwidth limit ALL IPs using anonymous ftp to just 1MB/s transfer rates. CDDIS is STRONGLY recommending all users begin to transition to using alternate method of access to the CDDIS archive. Examples of alternate methods can be found at: https://cddis.nasa.gov/Data_and_Derived_Products/CDDIS_Archive_Access.html.

close window
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 through anonymous ftp at ftp://cddis.gsfc.nasa.gov.

GNSS antenna
NGSLR site at GGAO
VLBI2010 antenna
DORIS antenna