Global and Regional Network Maps
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  • GNSS
  • SLR
  • VLBI
Learn about Techniques
CDDIS archive downloads continue to increase
26 Aug 2015
Over the past six month period, CDDIS downloads have continued to increase, with significant growth occurring from the international community. In July 2015 the CDDIS set a new monthly download record, with over 120M file downloads totaling over 12 Tbytes in volume. Downloads from international users accounted for over 65% of the total download bandwidth. In comparison, the total downloads for all of 2014 were 925M files/95 Tbytes in volume (monthly average of 77M files/8 Tbytes).

NASA Explains Why June 30 Will Get Extra Second
26 Jun 2015
The day will officially be a bit longer than usual on Tuesday, June 30, 2015, because an extra second, or "leap" second, will be added. "Earth's rotation is gradually slowing down a bit, so leap seconds are a way to account for that," said Daniel MacMillan of NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
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CDDIS Archive Explorer is now available through the CDDIS website
11 Jun 2015
This web application is a search/metadata interface tool for the CDDIS archive that will aid users in discovery of CDDIS data, products, and information. Users can specify any/all input parameters, such as temporal, spatial, target values. The resulting pages will present a map and list of sites satisfying the input parameters. Users can further drill down and view additional information about the sites. The CDDIS staff welcomes input on this new application.
Weekly GNSS data holdings (daily, hourly, high-rate)

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

Search the CDDIS data archive for SLR, DORIS, or GNSS data.

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

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