The SMAP/Sentinel-1 L2 Radiometer/Radar 30-Second Scene 3 km EASE-Grid Soil Moisture data set archived at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has

Soil Moisture Active Passive Data (SMAP)
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The SMAP Radiometer Twice-Daily rSIR-Enhanced EASE-Grid 2.0 Brightness Temperatures, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center
The latest versions of four SMAP Level-2 and Level-3 data sets, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), were released in the last
The SMAPVEX15 PALS Soil Moisture Data, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains soil
SMAP Level-4 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), can now be subsetted for a spatial area defined by a shapefile