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Description

This 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) radar as well as a variety of ancillary data sources. SMAP L-band soil moisture data are resampled to an Earth-fixed, global, cylindrical 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0).

Version Description

Changes to this version include:
  • Transitioned to Validated-Stage 1
  • Uses SPL2SMA V3 Validated data as input; inherited all changes and improvements of the new version
For the full major and minor version history, go to https://nsidc.org/data/smap/version-history

Product Summary

Platforms
SMAP
Instruments
SMAP L-BAND RADAR
Spatial Extent

N: 85.044 S: -85.044 E: 180 W: -180

Spatial Resolution
3 Kilometers x 3 Kilometers
Spatial Reference System(s)
WGS 84 / NSIDC EASE-Grid 2.0 Global (EPSG:6933)
Location
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2015-04-13 to 2015-07-07
Temporal Resolution
1 Day
Concept ID
C2872766452-NSIDC_CPRD
Data State
COMPLETE
Number of Files/Granules
84
Processing Level
3
Published
Science Keywords
SIGMA NAUGHT ,
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

Kim, S., Van Zyl, J., Dunbar, R., Njoku, E., Johnson, J., Moghaddam, M., & Tsang, L. (2016). SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture, Version 3 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/IGQNPB6183ZX Date Accessed: 2026-10-05

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Publications Citing This Dataset

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Title Authors Year Referenced Datasets
Soil Moisture Monitoring Method and Data Products: Current Research
  • Liu, Ruihao, Chang, Cun, Zhong, Ruisen, Lu, Shiyang
Estimating Backward Scattering using GNSS-Reflectometry Measurements for Soil Moisture Retrieval
  • Perez-Portero, Adrian, Rodriguez-Alvarez, Nereida, Francesc Munoz-Martin, Joan, Bosch-Lluis, Xavier, Oudrhiri, Kamal
Nitrogen fixing shrubs advance the pace of tall-shrub expansion in low-Arctic tundra
  • Schore, Aiden I. G., Fraterrigo, Jennifer M., Salmon, Verity G., Yang, Dedi, Lara, Mark J.
A clearer view of Earth's water cycle via neural networks and satellite data
  • Larson, Albert
Intercomparison of electromagnetic scattering models for delay-Doppler maps along a CYGNSS land track with topography
  • Campbell, James D., Akbar, Ruzbeh, Bringer, Alexandra, Comite, Davide, Dente, Laura, Gleason, Scott T., Guerriero, Leila, Hodges, Erik, Johnson, Joel T., Kim, Seung-Bum, Melebari, Amer, Pierdicca, Nazzareno, Ruf, Christopher S., Tsang, Leung, Wang, Tianlin, Xu, Haokui, Zhu, Jiyue, Moghaddam, Mahta
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