SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture V006

Published by NASA NSIDC DAAC | National Aeronautics and Space Administration | Metadata Last Checked: October 28, 2025 | Last Modified: 2025-07-17

This enhanced Level-3 (L3) soil moisture product provides a composite of daily estimates of global land surface conditions retrieved by the Soil Moisture Active Passive (SMAP) radiometer. This product is a daily composite of SMAP Level-2 (L2) soil moisture which is derived from SMAP Level-1C (L1C) interpolated brightness temperatures. Backus-Gilbert optimal interpolation techniques are used to extract information from SMAP antenna temperatures and convert them to brightness temperatures, which are posted to the 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) in a global cylindrical projection. As of 2021, the data are also posted to the Northern Hemisphere EASE-Grid 2.0, an azimuthal equal-area projection.

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Complete Metadata

bureauCode	[ "026:00" ]
identifier	C2776463943-NSIDC_ECS
issued	2015-03-31
landingPage	https://doi.org/10.5067/M20OXIZHY3RJ
language	[ "en-US" ]
programCode	[ "026:001" ]
spatial	-180.0 -85.044 180.0 90.0
temporal	2015-03-31T00:00:00Z/2025-03-24T00:00:00Z
theme	[ "geospatial" ]