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Description

This Level-3 (L3) product provides a daily composite of landscape freeze/thaw conditions retrieved by the Soil Moisture Active Passive (SMAP) radiometer from 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. SMAP L-band brightness temperatures are used to derive freeze/thaw state and transition data, which are then resampled to both an Earth-fixed, Northern Hemisphere azimuthal 36 km Equal-Area Scalable Earth Grid (EASE-Grid 2.0), and to an Earth-fixed global 36 km EASE-Grid 2.0.

Version Description

Changes to this version include: • Minor bug fix to correct the indexing of bits in the AMSER-E never-frozen never-thawed maps • An improved processing methodology was applied to the input Level-1C 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

Product Summary

Platforms
SMAP
Instruments
SMAP L-BAND RADIOMETER
Spatial Extent

N: 85.044 S: 45 E: 180 W: -180

,

N: 85.044 S: -85.044 E: 180 W: -180

Spatial Resolution
36 Kilometers x 36 Kilometers
Spatial Reference System(s)
Multiple EPSG codes (see User Guide)
Location
GLOBAL ,
NORTHERN HEMISPHERE
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2015-03-31 to Present
Temporal Resolution
1 Day
Concept ID
C2938664170-NSIDC_CPRD
Data State
ACTIVE
Number of Files/Granules
4137
Processing Level
3
Published
Science Keywords
Transition Direction

Documents

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Publications Citing This Dataset

Filters
Title Authors Year Referenced Datasets
Predicting Freeze-Thaw States in Alaska Permafrost Landscapes using
  • Ahajjam, A., Soaper, M., Chance, R., Chandler, J., Pasch, T.
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