NASA will be performing network maintenance on Thursday, May 13 from 3:00pm - 8:00pm (1900 UTC - 0000 UTC). You may experience network difficulties accessing ALL CDDIS services. You may experience outages as long as 15 minutes and multiple short (several minute) intermittent outages as well during the maintenance window.

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Cite the CDDIS

If you are using CDDIS data for a research publication, we ask that you properly acknowledge and or cite the CDDIS. Distribution of the CDDIS data sets is funded by NASA's Earth Science Data Systems program. The data are not copyrighted; however, in the event that you publish data or results using these data, we request that you include the following acknowledgment and/or citation:

The data used in this study were acquired as part of NASA's Earth Science Data Systems and archived and distributed by the Crustal Dynamics Data Information System (CDDIS).

Noll, Carey E., The Crustal Dynamics Data Information System: A resource to support scientific analysis using space geodesy, Advances in Space Research, Volume 45, Issue 12, 15 June 2010, Pages 1421-1440, ISSN 0273-1177, http://dx.doi.org/10.1016/j.asr.2010.01.018.

We would appreciate an email containing the publication reference to carey.noll @ nasa.gov.