SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 6
Data set id:
SPL1BTB
DOI: 10.5067/GWYQTF307Y9Y
This is the most recent version of these data.
Version Summary
Version Summary
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
• 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
Overview
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.
Parameter(s):
BRIGHTNESS TEMPERATURE
Platform(s):
SMAP
Sensor(s):
SMAP L-BAND RADIOMETER
Data Format(s):
HDF5
Temporal Coverage:
31 March 2015 to present
Temporal Resolution:
- 49 minute
Spatial Resolution:
- 47 km
- 36 km
Spatial Reference System(s):
WGS 84
EPSG:4326
Spatial Coverage:
N:
86.4
S:
-86.4
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
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Documentation
Help Articles
General Questions & FAQs
SMAP Ancillary data sets are used to produce SMAP Level-1, -2, -3, and -4 standard data products.
The following table describes both the required and actual latencies for the different SMAP radiometer data sets. Latency is defined as the time (# days, hh:mm:ss) from data acquisition to product generation.
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