On Wednesday, Dec. 3, 2025, from 8 a.m. to 9 a.m. ET there will be planned maintenance downtime at NASA's Atmospheric Science Data Center (ASDC) and the operating systems will be temporarily unavailable. This is an urgent update for critical vulnerabilities. We apologize for any inconvenience and appreciate your patience as we work to improve our systems.
We are in the process of migrating all NASA Earth science data sites into Earthdata from now until end of 2026. Not all NASA Earth science data and resources will appear here until then. Thank you for your patience as we make this transition.
Read about the Web Unification Project