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2016 User feedback survey
07 September 2016

Beginning this week, NASA will be conducting 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.

The American Customer Satisfaction Index (ACSI) is the only national cross-industry measure of customer satisfaction in the United States. NASA commissioned the CFI Group, an independent research and consulting organization to conduct the survey. Presentations of these results given to NASA Earth science are available at: http://earthdata.nasa.gov/about-eosdis/performance/american-customer-satisfaction-index-reports.

Please participate! Your feedback affects our future performance and helps to identify science needs. You will be able to take the survey for each DAAC you use. If you use NASA Earth science data and services and would like to take the survey but did not receive an e-mail with the survey link, please contact surveyhelp@cfigroup.com. This is your opportunity to influence the priorities of the DAACs. Thank you in advance to all of you who are willing to spend a few minutes to complete the survey.

11 August 2016
NASA Earthdata has published a user profile of Dr. Erricos Pavlis as part of their "Who uses NASA Earth science data?" series.

LARES + LAGEOS 1&2 Lense-Thirring results selected as EPJ-C cover
19 July 2016
The article, "A test of general relativity using the LARES and LAGEOS satellites and a GRACE Earth gravity model," (Ciufolini et. al.) has been published in the March 2016 issue of the European Physical Journal-C. Furthermore, a figure from this paper has been selected for the cover of that issue.

29 June 2016
Over the last 25 years, ocean radar altimeter satellites have revolutionized our understanding of the world’s oceans. Today six altimeter satellites from different national and international space agencies synoptically measure the ocean surface topography in order to determine how the ocean surface changes with time. The heart of the altimeter measurement is the precise determination of the orbit reference which is used as the basis from which the changes in the ocean surface are determined. We now routinely determine the orbits of the joint NASA/CNES/NOAA/EUMETSAT missions Jason-2 and Jason-3 with a radial RMS precision of 1 cm.
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CDDIS upgrading to a new system
01 June 2016
In the near future CDDIS will be upgrading to a new system. One important change involves how files are uploaded to our system. CDDIS will NO LONGER SUPPORT the current ftp upload procedures in our new environment. Anyone who submits files for archive in the CDDIS must update their procedures.
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Weekly GNSS data holdings (daily, hourly, high-rate)

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

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

Site Log Viewer Tool Browse SLR, DORIS, or GNSS site logs by site or across the network.

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