SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 6
Data set id:
SPL3SMP_E
DOI: 10.5067/M20OXIZHY3RJ
This is the most recent version of these data.
Version Summary
Version Summary
Changes to this version include:
• An improved processing methodology was applied to the input enhanced Level-2 radiometer brightness temperatures.
• The data algorithms, structure, content, or processor code are otherwise unchanged from the previous version.
For the full major and minor version history, go to https://nsidc.org/data/smap/version-history
• An improved processing methodology was applied to the input enhanced Level-2 radiometer brightness temperatures.
• The data algorithms, structure, content, or processor code are otherwise unchanged from the previous version.
For the full major and minor version history, go to https://nsidc.org/data/smap/version-history
Overview
This enhanced 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) radiometer. This product is a daily composite of SMAP Level-2 (L2) soil moisture which is derived from SMAP Level-1C (L1C) interpolated brightness temperatures. Backus-Gilbert optimal interpolation techniques are used to extract information from SMAP antenna temperatures and convert them to brightness temperatures, which are posted to the 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) in a global cylindrical projection. As of 2021, the data are also posted to the Northern Hemisphere EASE-Grid 2.0, an azimuthal equal-area projection.
Parameter(s):
BRIGHTNESS TEMPERATURE
SURFACE SOIL MOISTURE
Platform(s):
SMAP
Sensor(s):
SMAP L-BAND RADIOMETER
Data Format(s):
HDF5
Temporal Coverage:
- 31 March 2015 to present
Temporal Resolution:
- 1 day
Spatial Resolution:
- 9 km
- 9 km
Spatial Reference System(s):
- WGS 84 / NSIDC EASE-Grid 2.0 NorthEPSG:6931
- WGS 84 / NSIDC EASE-Grid 2.0 GlobalEPSG:6933
Spatial Coverage:
- Northern latitude90Southern latitude-85.044Eastern longitude180Western longitude-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
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