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Soil Moisture Active Passive Data (SMAP)

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Data

The following table includes the official SMAP mission data currently available from NSIDC DAAC. These data products have been produced and validated by the SMAP Science Team. The Level 1 products contain raw or calibrated and geolocated instrument measurements from the SMAP Radar and Radiometer; all Level 1 products have a temporal resolution of 49 minutes, the length of time required for the SMAP satellite to complete a half orbit of the Earth. The Level 2 products contain soil moisture retrievals derived from Level 1 products and ancillary files; all Level 2 products are based on half orbits, with a temporal resolution of 49 minutes. The Level 3 products are daily composites of the Level 2 soil moisture and freeze/thaw state data. The Level 4 products provide model-derived root-zone soil moisture and carbon net ecosystem exchange.

For more information, see the SMAP Data Products description on the Jet Propulsion Laboratory website.

SMAP Data Sets

Data for this collection: 23
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NAMETEMPORAL COVERAGEPARAMETER(S)
Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 (SPL1BTB_NRT) to presentANTENNA TEMPERATURE | BRIGHTNESS TEMPERATURE
Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 (SPL2SMP_NRT) to presentBRIGHTNESS TEMPERATURE | SURFACE SOIL MOISTURE
SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures, Version 4 (SPL1CTB_E) to presentBRIGHTNESS TEMPERATURE
SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 6 (SPL2SMP_E) to presentBRIGHTNESS TEMPERATURE | SURFACE SOIL MOISTURE
SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State, Version 4 (SPL3FTP_E) to presentTRANSITION DIRECTION
SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 6 (SPL3SMP_E) to presentBRIGHTNESS TEMPERATURE | SURFACE SOIL MOISTURE
SMAP L1A Radiometer Time-Ordered Parsed Telemetry, Version 2 (SPL1AP) to presentSENSOR COUNTS
SMAP L1B Radiometer Half-Orbit Radio Frequency Interference and Calibration Data, Version 6 (SPL1BTB_RFICAL) to presentANTENNA TEMPERATURE
SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 6 (SPL1BTB) to presentBRIGHTNESS TEMPERATURE
SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures, Version 6 (SPL1CTB) to presentBRIGHTNESS TEMPERATURE
SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture, Version 3 (SPL2SMA) to SIGMA NAUGHT | SOIL MOISTURE/WATER CONTENT
SMAP L2 Radar/Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 3 (SPL2SMAP) to BRIGHTNESS TEMPERATURE | SIGMA NAUGHT | SOIL MOISTURE/WATER CONTENT
SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 9 (SPL2SMP) to presentBRIGHTNESS TEMPERATURE | SURFACE SOIL MOISTURE
SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture, Version 3 (SPL3SMA) to SIGMA NAUGHT | SOIL MOISTURE/WATER CONTENT
SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State, Version 3 (SPL3FTA) to FREEZE/THAW | SIGMA NAUGHT | TRANSITION DIRECTION
SMAP L3 Radar/Radiometer Global Daily 9 km EASE-Grid Soil Moisture, Version 3 (SPL3SMAP) to BRIGHTNESS TEMPERATURE | SIGMA NAUGHT | SOIL MOISTURE/WATER CONTENT
SMAP L3 Radiometer Global and Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State, Version 4 (SPL3FTP) to presentTRANSITION DIRECTION
SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture, Version 9 (SPL3SMP) to presentBRIGHTNESS TEMPERATURE | SURFACE SOIL MOISTURE
SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update, Version 8 (SPL4SMAU) to presentROOT ZONE SOIL MOISTURE | SURFACE SOIL MOISTURE
SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data, Version 8 (SPL4SMGP) to presentROOT ZONE SOIL MOISTURE | SURFACE SOIL MOISTURE
SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants, Version 8 (SPL4SMLM) to presentSOIL CLASSIFICATION | SOIL DEPTH | SOIL POROSITY | SOIL TEXTURE | TERRAIN ELEVATION
SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 8 (SPL4CMDL) to presentGROSS PRIMARY PRODUCTION (GPP) | HETEROTROPHIC RESPIRATION (Rh) | NET ECOSYSTEM CO2 EXCHANGE (NEE) | SOIL ORGANIC CARBON (SOC)
SMAP/Sentinel-1 L2 Radiometer/Radar 30-Second Scene 3 km EASE-Grid Soil Moisture, Version 3 (SPL2SMAP_S) to presentBRIGHTNESS TEMPERATURE | SIGMA NAUGHT | SURFACE SOIL MOISTURE
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