• On Wednesday, May 21 from 9:00 a.m. to 2:30 p.m. (US Mountain Time), this data set may not be available in the legacy data archive due to a planned system maintenance. Earthdata Cloud access will remain available for data sets that have migrated. Users of the SMAP near real-time products should use the NASA LANCE HTTPS File System for data access. 

Soil Moisture Active Passive Data (SMAP)

Documentation

ATBDs

General Resources

Quality Assessment Reports

Product Specification Documents

Validation Campaign Documents