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SMAP Data Access and Tools
NASA's Soil Moisture Active Passive (SMAP) data products include information about soil moisture and freeze thaw state. Additional Level 4 value-added products are available. Data tools such as Vertex and Earthdata Search enable users to discover and download data.
Datasets
| Dataset | Instruments | Temporal Extent | Spatial Extent | Version | Data State | Data Format | Related Topics |
|---|---|---|---|---|---|---|---|
| SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture V006 | SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 90 S: -85.044 E: 180 W: -180 | 006 | ACTIVE | HDF5 | Brightness Temperature, Surface Soil Moisture |
| Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures V105 | SMAP L-BAND RADIOMETER | 2025-06-26 to Present | N: 86.4 S: -86.4 E: 180 W: -180 | 105 | ACTIVE | HDF5 | ANTENNA TEMPERATURE, Brightness Temperature |
| SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants V008 | NOT APPLICABLE, SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 85.044 S: -85.044 E: 180 W: -180 | 008 | ACTIVE | HDF5 | Soil Classification, Soil Depth, Soil Porosity, Soil Texture, Terrain Elevation |
| SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures V006 | SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 85.044 S: -85.044 E: 180 W: -180 | 006 | ACTIVE | HDF5 | Brightness Temperature |
| SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V001 | SMAP L-BAND RADIOMETER, SMOS L-BAND RADIOMETER | 2015-05-01 to 2022-01-01 | N: 90 S: -90 E: 180 W: -180 | 1 | COMPLETE | HDF5 | Brightness Temperature, Surface Soil Moisture, Vegetation Optical Depth |
| SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture V009 | SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 85.044 S: -85.044 E: 180 W: -180 | 009 | ACTIVE | HDF5 | Brightness Temperature, Surface Soil Moisture |
| SMAP Radiometer Twice-Daily rSIR-Enhanced EASE-Grid 2.0 Brightness Temperatures V003 | SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 90 S: -90 E: 180 W: -180 | 3 | ACTIVE | netCDF-4 | Brightness Temperature |
| SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture V009 | SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 85.044 S: -85.044 E: 180 W: -180 | 009 | ACTIVE | HDF5 | Brightness Temperature, Surface Soil Moisture |
| SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State V004 | SMAP L-BAND RADIOMETER | 2015-03-31 to Present | N: 85.044 S: -85.044 E: 180 W: -180 | 004 | ACTIVE | HDF5 | Transition Direction |
| SMAP/CYGNSS EASE-Grid Soil Moisture V001 | DDMI, SMAP L-BAND RADIOMETER | 2017-04-01 to 2023-12-31 | N: 40 S: -40 E: 180 W: -180 | 1 | COMPLETE | HDF5 | Brightness Temperature, Surface Soil Moisture |
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SMAP Data Tools
| Tool Sort descending | Description | Services | |
|---|---|---|---|
| HiTIDE | Use HiTIDE to subset and download popular Level 2 (swath) datasets. | Search and Discovery, Subsetting, Downloading | |
| SOTO | State of the Ocean (SOTO) is an interactive web-based tool that generates informative maps, animations, and plots that communicate and prove the discovery and analysis of the state of the oceans. | Analysis, Search and Discovery, Visualization | |
| Worldview | Worldview offers the capability to interactively browse over 1,200 global, full-resolution satellite imagery layers and download the underlying data. | Analysis, Search and Discovery, Visualization, Access, Comparison, Monitoring Natural Events |
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