Forum

How do I access the CDDIS data archive? There are several ways to access the CDDIS archive: via https at URL https://cddis.nasa.gov/archive/ via ftp-ssl using the command line and gdc.cddis.eosdis.nasa.gov Detalied information and examples for using these methods can be found on our Archive Access ...

How can I access SLR data? Satellite laser ranging data are available through several methods. SLR data since 1976 are available online. Access the SLR data using one of the following methods: via https at URL https://cddis.nasa.gov/archive/slr/data/ via ftp-ssl using the command line and ftps://gd...

How can I access DORIS data? DORIS data are available in satellite subdirectories through encrypted ftp and other methods. DORIS data since 1992 are available online. Access the DORIS data using one of the following methods: via https at URL https://cddis.nasa.gov/archive/doris/data/ via ftp-ssl us...

How do I register for an NTRIP Data Caster account? All of the product streams on the CDDIS NTRIP Data Caster are protected. Authorization is a two-step process: 1. Register for an Earthdata Login 2. Complete the CDDIS registration form What do I do if I forgot my username or password? The Earthdat...

How can I access VLBI data? VLBI data are available through encrypted ftp and other methods. VLBI databases since 1979 are available online. Access the VLBI data using one of the following methods: via https at URL https://cddis.nasa.gov/archive/vlbi/ivsdata/ via ftp-ssl using the command line and ...

See below for a Table of Contents with links to individual CDDIS FAQ sections

General FAQ:
General

Techniques:
DORIS
GNSS
GLONASS
NTRIP Data Caster
SLR/LLR
VLBI

File Uploads/Downloads:
File Uploads
File Upload Procedures
File Downloads
File Download Procedures

How can I access GLONASS data? Data from GLONASS-only GNSS receivers are available from June 11, 2002 (day 2002162) through July 09, 2005 (day 2005190). The GLONASS data are available through https and other methods at two URLs. GLONASS data obtained through the IGEX-98 campaign (August 1998) throu...

What type of GNSS data are available from the CDDIS? The CDDIS provides an archive of GNSS data in support of the International GNSS Service (IGS, www.igs.org). We have data in daily files (30 second sampling) going back to 1992, hourly files (30-second sampling), and high-rate files (1-second samp...

Hello scmember, To better assist you, we need to ask for a point of clarification. You stated that some time periods fail, but you also state that it maxes out at 2,000 hits, with most of them pre-2022. So your search appears to have been successful, but that you ran into a max? Or were you specific...

In the drop-down for the Data Centers Short Name in MMT, we are listed as "NASA/GSFC/SED/ESD/GGL/CDDIS" this is how you have to find us in Earthdata Search when looking to filter on "Organization". We would like to change the short name to "Crustal Dynamics Data Information ...