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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
SMAP ,
Sentinel-1A ,
Sentinel-1B
Instruments
SMAP L-BAND RADIOMETER ,
C-SAR
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 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/9UWR1WTHW1WN Date Accessed: 2026-10-07

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Publications Citing This Dataset

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Title Authors Year Referenced Datasets
Reviews and syntheses: Recent advances in microwave remote sensing in support of terrestrial carbon cycle science in Arcticboreal regions
  • Mavrovic, Alex, Sonnentag, Oliver, Lemmetyinen, Juha, Baltzer, Jennifer L., Kinnard, Christophe, Roy, Alexandre
Light pollution affects West Nile virus exposure risk across Florida
  • Kernbach, Meredith E., Martin, Lynn B., Unnasch, Thomas R., Hall, Richard J., Jiang, Rays H. Y., Francis, Clinton D.
Caracterizacion de dinamicas hidrogeologicas en zonas de explotacion minera de litio a partir del uso de productos satelitales
  • Seppi, Santiago, German, Alba, Beltramone, Giuliana, Melin, Almendra Brasca, Scavuzzo, Carlos Marcelo, Ferral, Anabella
The SMAP and Copernicus Sentinel 1A/B Microwave Active-Passive High Resolution Surface Soil Moisture Product and its Applications
  • Das, Narendra N., Entekhabi, Dara, Dunbar, R. Scott, Chaubell, Mario J., Colliander, Andreas, Yueh, Simon, Jagdhuber, Thomas, Chen, Fan, Crow, Wade, O'Neill, Peggy E., Walker, Jeffrey P., Berg, Aaron, Bosch, David D., Caldwell, Todd, Cosh, Michael H., Collins, Chandra H., Lopez-Baeza, Ernesto, Thibeault, Marc
A machine learning approach for mapping the very shallow theoretical geothermal potential
  • Assouline, Dan, Mohajeri, Nahid, Gudmundsson, Agust, Scartezzini, Jean-Louis
Regional evapotranspiration estimates using the relative soil moisture ratio derived from SMAP products
  • Walker, Elisabet, Garcia, Gabriel A., Venturini, Virginia, Carrasco, Aylen
Estimation of active-passive microwave covariation using SMAP and Sentinel-1 data
  • Jagdhuber, Thomas, Baur, Martin, Akbar, Ruzbeh, Das, Narendra N., Link, Moritz, He, Lian, Entekhabi, Dara
Linking Remote Sensing and Geodiversity and Their Traits Relevant to
  • Lausch, Angela, Baade, Jussi, Bannehr, Lutz, Borg, Erik, Bumberger, Jan, Chabrilliat, Sabine, Dietrich, Peter, Gerighausen, Heike, Glasser, Cornelia, Hacker, Jorg, Haase, Dagmar, Jagdhuber, Thomas, Jany, Sven, Jung, Andras, Karnieli, Arnon, Kraemer, Roland, Makki, Mohsen, Mielke, Christian, Moller, Markus, Mollenhauer, Hannes, Montzka, Carsten, Pause, Marion, Rogass, Christian, Rozenstein, Offer, Schmullius, Christiane, Schrodt, Franziska, Schron, Martin, Schulz, Karsten, Schutze, Claudia, Schweitzer, Christian, Selsam, Peter, Skidmore, Andrew, Spengler, Daniel, Thiel, Christian, Truckenbrodt, Sina, Vohland, Michael, Wagner, Robert, Weber, Ute, Werban, Ulrike, Wollschlager, Ute, Zacharias, Steffen, Schaepman, Michael
High-resolution enhanced product based on smap active-passive approach using sentinel 1A and 1B SAR data
  • Das, N. N., Entekhabi, D., Kim, S., Jagdhuber, T., Dunbar, S., Yueh, S., ONeill, P. E., Colliander, A., Walker, J., Jackson, T. J.
High resolution soil moisture product based on Smap active-passive approach using Copernicus sentinel 1 data
  • Das, Narendra N., Entekhabi, Dara, Kim, Seungbum, Jagdhuber, Thomas, Dunbar, Scott, Yuehl, Simon, Oneill, P. E., Colliander, Andreas, Walker, Jeffery, Jackson, Thomas J.
Physics-based modeling of active-passive microwave covariations for geophysical retrievals
  • Jagdhuber, T, Entekhabi, D., Das, NN., Link, M., Baur, M., Akbar, R., Montzka, C., Kim, S., Yueh, S., Baris, I.
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