SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State, Version 3
Data set id:
SPL3FTA
DOI: 10.5067/CPSA0M496MGB
This is the most recent version of these data.
Version Summary
Version Summary
Changes to this version include:
For the full major and minor version history, go to https://nsidc.org/data/smap/version-history
- Transitioned to Validated-Stage 2
- Uses SPL1CS0 V3 Validated data as input
- Using full swath except for nadir-anomaly flagged areas to provide better coverage
- Resolved some flag and fillValue errors
For the full major and minor version history, go to https://nsidc.org/data/smap/version-history
Overview
This Level-3 (L3) product provides a daily composite of Northern Hemisphere landscape freeze/thaw conditions retrieved by the Soil Moisture Active Passive (SMAP) radar from 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. SMAP L-band backscatter data are used to derive freeze/thaw data, which are then resampled to an Earth-fixed, Northern Hemisphere azimuthal 3 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0).
Parameter(s):
FREEZE/THAWSIGMA NAUGHTTRANSITION DIRECTION
Platform(s):
SMAP
Sensor(s):
SMAP L-BAND RADAR
Data Format(s):
HDF5, HDF5
Temporal Coverage:
13 April 2015 to 7 July 2015
Temporal Resolution:
- 1 day
Spatial Resolution:
- 3 km
- 3 km
Spatial Reference System(s):
WGS 84 / NSIDC EASE-Grid 2.0 North
EPSG:6931
Spatial Coverage:
N:
85.044
S:
45
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
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General Questions & FAQs
OPeNDAP, the Open-source Project for a Network Data Access Protocol, is a NASA community standard DAP that provides a simple way for researchers to access and work with data over the internet.
SMAP Ancillary data sets are used to produce SMAP Level-1, -2, -3, and -4 standard data products.
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