Soil Moisture Active Passive Data (SMAP)

Data

The following table lists SMAP science data products and related data available from the NSIDC DAAC. 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: 34
NAMESPATIAL RESOLUTIONPARAMETER(S)
Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 (SPL1BTB_NRT)47 km x 36 km
ANTENNA TEMPERATUREBRIGHTNESS TEMPERATURE
Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 (SPL2SMP_NRT)36 km x 36 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures, Version 3 (SPL1CTB_E)9 km x 9 km
BRIGHTNESS TEMPERATURE
SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures, Version 4 (SPL1CTB_E)9 km x 9 km
BRIGHTNESS TEMPERATURE
SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 5 (SPL2SMP_E)9 km x 9 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 6 (SPL2SMP_E)9 km x 9 km
BRIGHTNESS TEMPERATURE
SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State, Version 3 (SPL3FTP_E)9 km x 9 km
BRIGHTNESS TEMPERATUREFREEZE/THAWTRANSITION DIRECTION
SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State, Version 4 (SPL3FTP_E)9 km x 9 km
TRANSITION DIRECTION
SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 5 (SPL3SMP_E)9 km x 9 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 6 (SPL3SMP_E)9 km x 9 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP L1A Radar Time-Ordered Parsed Telemetry, Version 1 (SPL1AA)1 km to 3 km x 1 km to 3 km
SIGMA NOUGHT
SMAP L1A Radiometer Time-Ordered Parsed Telemetry, Version 2 (SPL1AP)40 km x 40 km
SENSOR COUNTS
SMAP L1B Radar Half-Orbit Time-Ordered Low-Resolution σo Data, Version 1 (SPL1BS0)1 km to 3 km x 1 km to 3 km
SIGMA NOUGHT
SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 5 (SPL1BTB)47 km x 36 km
ANTENNA TEMPERATUREBRIGHTNESS TEMPERATURE
SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 6 (SPL1BTB)47 km x 36 km
BRIGHTNESS TEMPERATURE
SMAP L1C Radar Half-Orbit High-Resolution σo Data on 1 km Swath Grid, Version 1 (SPL1CS0)1 km to 3 km x 1 km to 3 km
SIGMA NOUGHT
SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures, Version 5 (SPL1CTB)36 km x 36 km
BRIGHTNESS TEMPERATURE
SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures, Version 6 (SPL1CTB)36 km x 36 km
BRIGHTNESS TEMPERATURE
SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture, Version 3 (SPL2SMA)3 km x 3 km
SIGMA NAUGHTSOIL MOISTURE
SMAP L2 Radar/Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 3 (SPL2SMAP)9 km x 9 km
BRIGHTNESS TEMPERATURESIGMA NAUGHTSOIL MOISTURE
SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 8 (SPL2SMP)36 km x 36 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 9 (SPL2SMP)36 km x 36 km
BRIGHTNESS TEMPERATURE
SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture, Version 3 (SPL3SMA)3 km x 3 km
SIGMA NAUGHTSOIL MOISTURE
SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State, Version 3 (SPL3FTA)3 km x 3 km
FREEZE/THAWSIGMA NAUGHTTRANSITION DIRECTION
SMAP L3 Radar/Radiometer Global Daily 9 km EASE-Grid Soil Moisture, Version 3 (SPL3SMAP)9 km x 9 km
BRIGHTNESS TEMPERATURESIGMA NAUGHTSOIL MOISTURE
SMAP L3 Radiometer Global and Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State, Version 3 (SPL3FTP)36 km x 36 km
BRIGHTNESS TEMPERATUREFREEZE/THAWTRANSITION DIRECTION
SMAP L3 Radiometer Global and Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State, Version 4 (SPL3FTP)36 km x 36 km
TRANSITION DIRECTION
SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture, Version 8 (SPL3SMP)36 km x 36 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture, Version 9 (SPL3SMP)36 km x 36 km
BRIGHTNESS TEMPERATURESURFACE SOIL MOISTURE
SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update, Version 7 (SPL4SMAU)9 km x 9 km
ROOT ZONE SOIL MOISTURESURFACE SOIL MOISTURE
SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data, Version 7 (SPL4SMGP)9 km x 9 km
ROOT ZONE SOIL MOISTURESURFACE SOIL MOISTURE
SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants, Version 7 (SPL4SMLM)9 km x 9 km
SOIL CLASSIFICATIONSOIL DEPTHSOIL POROSITYSOIL TEXTURETERRAIN ELEVATION
SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 7 (SPL4CMDL)9 km x 9 km
GROSS 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)3 km x 3 km
BRIGHTNESS TEMPERATURESIGMA NAUGHTSURFACE SOIL MOISTURE