Skip to main content

Description

This Level-2 (L2) soil moisture product provides estimates of land surface conditions retrieved by both the Soil Moisture Active Passive (SMAP) radiometer during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes and the Sentinel-1A and -1B radar. SMAP L-band brightness temperatures and Copernicus Sentinel-1 C-band backscatter coefficients are used to derive soil moisture data, which are then resampled to an Earth-fixed, cylindrical 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0).

Note: These data are Beta-release quality, meaning that they have not undergone full validation and may still contain significant errors.

Version Description

First public data release (Beta)

Product Summary

Platforms
Sentinel-1A ,
Sentinel-1B ,
SMAP Observatory
Instruments
SAR ,
C-SAR ,
SMAP L-BAND RADIOMETER
Spatial Extent

N: 60 S: -60 E: 180 W: -180

Spatial Resolution
3 Kilometers x 3 Kilometers
Location
OCEANIA ,
AFRICA ,
ASIA ,
EUROPE ,
NORTH AMERICA ,
SOUTH AMERICA
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2015-04-01 to 2018-06-03
Temporal Resolution
30 Second
Concept ID
C2812932824-NSIDC_CPRD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
2
Published
Updated
Science Keywords
Soil Moisture/Water Content

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Das, N., Entekhabi, D., Kim, S., Yueh, S., Dunbar, R., & Colliander, A. (2017). SMAP/Sentinel-1 L2 Radiometer/Radar 30-Second Scene 3 km EASE-Grid Soil Moisture, Version 1 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/9UWR1WTHW1WN Date Accessed: 2026-05-28

Documents