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Description

This Level-1B (L1B) product provides calibrated estimates of time-ordered geolocated brightness temperatures measured by the Soil Moisture Active Passive (SMAP) passive microwave radiometer. SMAP L-band brightness temperatures are referenced to the Earth's surface with undesired and erroneous radiometric sources removed.

Version Description

Changes to this version include: • A new 1-km land-water mask based on the MODIS44w V6 data is used to determine land-water Tb corrections. The mask: o more accurately portrays current coastal and inland water body boundaries o adds an ice shelf type to determine an ice shelf fraction for a given footprint or grid cell, reflected in new data elements ice_shelf_fraction_h and ice_shelf_fraction_v • The maximum Tb threshold has been reduced from 340K to 310K to further remove RFI contamination For the full major and minor version history, go to https://nsidc.org/data/smap/version-history

Product Summary

Platforms
SMAP
Instruments
SMAP L-BAND RADIOMETER
Spatial Extent

N: 86.4 S: -86.4 E: 180 W: -180

Spatial Resolution
36 Kilometers x 47 Kilometers
Spatial Reference System(s)
WGS 84 (EPSG:4326)
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2015-03-31 to Present
Temporal Resolution
49 Minute
Concept ID
C2938661904-NSIDC_CPRD
Data State
ACTIVE
Number of Files/Granules
120060
Processing Level
1B
Published
Science Keywords
Brightness Temperature

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