SMAP Data

The following table lists the SMAP science data products and related data. 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

Title Spatial Resolution Temporal Coverage Parameter(s)

SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures, Version 3

 		9 km x 9 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE

SMAP L1A Radar Time-Ordered Parsed Telemetry, Version 1

 		1 km to 3 km x 1 km to 3 km
  • 2015-04-13 to 2015-07-07
 Sigma Nought

SMAP L1A Radiometer Time-Ordered Parsed Telemetry, Version 2

 		40 km x 40 km
  • 2015-03-31
 SENSOR COUNTS

SMAP L1B Radar Half-Orbit Time-Ordered Low-Resolution σo Data, Version 1

 		1 km to 3 km x 1 km to 3 km
  • 2015-04-13 to 2015-07-07
 Sigma Nought

SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 5

 		47 km x 36 km
  • 2015-03-31
 ANTENNA TEMPERATURE, BRIGHTNESS TEMPERATURE

SMAP L1C Radar Half-Orbit High-Resolution σo Data on 1 km Swath Grid, Version 1

 		1 km to 3 km x 1 km to 3 km
  • 2015-04-13 to 2015-07-07
 Sigma Nought

SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures, Version 5

 		36 km x 36 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE
Titlesort descending Spatial Resolution Temporal Coverage Parameter(s)

SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 4

 		9 km x 9 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, SURFACE SOIL MOISTURE

SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture, Version 3

 		3 km x 3 km
  • 2015-04-13 to 2015-07-07
 SIGMA NAUGHT, SOIL MOISTURE

SMAP L2 Radar/Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 3

 		9 km x 9 km
  • 2015-04-13 to 2015-07-07
 BRIGHTNESS TEMPERATURE, SIGMA NAUGHT, SOIL MOISTURE

SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 7

 		36 km x 36 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, SURFACE SOIL MOISTURE

SMAP/Sentinel-1 L2 Radiometer/Radar 30-Second Scene 3 km EASE-Grid Soil Moisture, Version 3

 		3 km x 3 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, SIGMA NAUGHT, SURFACE SOIL MOISTURE
Titlesort descending Spatial Resolution Temporal Coverage Parameter(s)

SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State, Version 3

 		9 km x 9 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, FREEZE/THAW, TRANSITION DIRECTION

SMAP Enhanced L3 Radiometer Global Daily 9 km EASE-Grid Soil Moisture, Version 4

 		9 km x 9 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, SURFACE SOIL MOISTURE

SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture, Version 3

 		3 km x 3 km
  • 2015-04-13 to 2015-07-07
 SIGMA NAUGHT, SOIL MOISTURE

SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State, Version 3

 		3 km x 3 km
  • 2015-04-13 to 2015-07-07
 FREEZE/THAW, SIGMA NAUGHT, TRANSITION DIRECTION

SMAP L3 Radar/Radiometer Global Daily 9 km EASE-Grid Soil Moisture, Version 3

 		9 km x 9 km
  • 2015-04-13 to 2015-07-07
 BRIGHTNESS TEMPERATURE, SIGMA NAUGHT, SOIL MOISTURE

SMAP L3 Radiometer Global and Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State, Version 3

 		36 km x 36 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, FREEZE/THAW, TRANSITION DIRECTION

SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture, Version 7

 		36 km x 36 km
  • 2015-03-31
 BRIGHTNESS TEMPERATURE, SURFACE SOIL MOISTURE
Titlesort descending Spatial Resolution Temporal Coverage Parameter(s)

SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update, Version 5

 		9 km x 9 km
  • 2015-03-31
 ROOT ZONE SOIL MOISTURE, SURFACE SOIL MOISTURE

SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data, Version 5

 		9 km x 9 km
  • 2015-03-31
 ROOT ZONE SOIL MOISTURE, SURFACE SOIL MOISTURE

SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants, Version 5

 		9 km x 9 km
  • 2015-03-31
 SOIL CLASSIFICATION, SOIL DEPTH, SOIL POROSITY, SOIL TEXTURE, TERRAIN ELEVATION

SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 5

 		9 km x 9 km
  • 2015-03-31
 GROSS PRIMARY PRODUCTION (GPP), HETEROTROPHIC RESPIRATION (Rh), NET ECOSYSTEM CO2 EXCHANGE (NEE), SOIL ORGANIC CARBON (SOC)