This Level-2 (L2) soil moisture product provides estimates of global land surface conditions retrieved by the Soil Moisture Active Passive (SMAP) active radar during 6:00 a.m. descending half-orbit passes, as well as ancillary data such as surface temperature and vegetation water content. Input backscatter data used to derive soil moisture are resampled to an Earth-fixed, global, cylindrical 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0).
SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture, Version 3
This is the most recent version of these data.
Changes to this version include:
- Transitioned to Validated-Stage 1
- Uses updated SPL1CS0 V3 as input
- Updates to some of the data cubes
- Update of crop database
- Modified iterative bias correction
- Estimation of VWC
For the full major and minor version history, go to https://nsidc.org/data/smap/data_versions.
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Data: Data integrity and usability verified; data customization services available for select data
Documentation: Key metadata and comprehensive user guide available
User Support: Assistance with data access and usage; guidance on use of data in tools and data customization services
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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.
Kim, S., J. Van Zyl, R. S. Dunbar, E. G. Njoku, J. T. Johnson, M. Moghaddam, and L. Tsang. 2016. SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture, Version 3. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/J8SGO1E0Y9XZ. [Date Accessed].