USER ALERT: CDDIS has undergone a migration from cddis.nasa.gov to earthdata.nasa.gov, effective June 2025. Most of the links will now go to a new web page on the Earthdata website. CDDIS has also migrated our FAQ from cddis.nasa.gov to forum.earthdata.nasa.gov, effective May 2025. For more information, please see the following web page (https://cddis.nasa.gov/Web_Unification.html)

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CDDIS: NASA's Archive of Space Geodesy Data
User Alert:
NASA Earthdata Web Unification - What You Need to Know

In response to requirements outlined in the 21st Century Integrated Digital Experience Act (IDEA), NASA launched the Web Modernization Project to consolidate the agency's multitude of websites into nasa.gov or science.nasa.gov. NASA’s Earth Science Data Systems (ESDS) Program followed suit and launched the Web Unification Project in December 2021 to migrate all ESDS-funded web properties to earthdata.nasa.gov by the end of 2026.

Beginning in October 2024, updates will take place on the public-facing Earthdata website. These changes will include the migration of NASA’s Distributed Active Archive Center (DAAC) websites (including cddis.nasa.gov) to the Earthdata website.

What will this mean for you? With these changes, only the interface that you use to access CDDIS information and web content will change to one unified experience; the paths for finding and downloading our data will not change (located at https://cddis.nasa.gov/archive/; Earthdata Login required to access). By combining NASA’s DAACs into the Earthdata website, ESDS aims to improve data discoverability and data findability and build efficient pathways for data users to access data and information.

CDDIS has completed the transition from cddis.nasa.gov to earthdata.nasa.gov, effective June 2025. We ask you to please be aware that our web pages will now redirect to a new page on the Earthdata website. We hope that this is as seamless a transition as is possible.

We want to reassure all our users that your data will still be available in the same place and the same URL in our archive (located at https://cddis.nasa.gov/archive/; Earthdata Login required to access). This will not affect how or where you access our data. It will, however, affect where you see our web content, as we have joined the Earthdata website.

To learn about the DAAC website migration schedule, to view the new user path options for finding the DAAC data resources you need, and to learn how to get support during this transition, view our recent webinar, “Web Unification: Optimizing Your Access to NASA Earth Science Data”.

Please contact us for more information or questions.

Thank you for your patience, and welcome to NASA Earthdata.