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Learn about Techniques
19th International Laser Ranging Workshop was a great success
18 Nov 2014
The 19th International Laser Ranging Workshop was hosted by NASA GSFC from October 27-31, 2014 in Annapolis, Maryland. October 31 marks the 50th anniversary of the first successful Satellite Laser Ranging (SLR) measurement which occurred at the Goddard Geophysical and Astronomical Observatory (GGAO) in 1964. The theme for this workshop, "Celebrating 50 Years of SLR: Remembering the Past and Planning for the Future" allowed the community to look back on its many accomplishments and to present plans for future advances in SLR technology and science. Read more

28 Aug 2014
In a field near Goddard 50 years ago this October, the first successful Satellite Laser Ranging (SLR) measurements were taken, ushering in a new era in the science of measuring the Earth. Read more

26 Aug 2014
In the next few days, you will receive an email from CFI Group on behalf of NASA. This message will ask you to complete a survey for users of NASA Earth science data and services, which includes the Crustal Dynamics Data Information System (CDDIS). The CDDIS is one of twelve NASA Earth Observing System Data and Information System (EOSDIS) science data centers evaluated by this survey. The purpose of this survey is to help NASA and the DAACs assess customer satisfaction and improve future services. Suggestions from past surveys have been implemented to improve the tools and services offered by the CDDIS. Read more

06 Aug 2014
The CDDIS Site Log Viewer tool is now available. Browse SLR, DORIS, or GNSS site logs by individual site or across multiple sites.
Weekly GNSS data holdings (daily, hourly, high-rate)

Weekly SLR normal point pass segment totals (by satellite, LAGEOS and ETALON only)

Browse SLR, DORIS, or GNSS site logs by site or across the network.

Search and discover CDDIS data holdings using the GSAC-WS.