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Data Set ID: 
SPL1BTB

SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 4

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.

There is a more recent version of these data.

Version Summary: 

Changes to this version include:

  • Added procedure to correct brightness temperatures for water/land contamination near coastlines. New data fields for this correction include:
    footprint_surface_status, surface_water_fraction_mb_h, surface_water_fraction_mb_v, tb_h_surface_corrected, and tb_v_surface_corrected.
  • Improved Level-1 calibration coefficients and reflected galaxy correction. To refine reflected galaxy correction over ocean, NOAA NCEP ocean roughness data have been added (wind_direction_ancillary, wind_speed_ancillary).

For the full major and minor version history, go to https://nsidc.org/data/smap/data_versions.

Parameter(s):
  • MICROWAVE > ANTENNA TEMPERATURE
  • MICROWAVE > ANTENNA TEMPERATURE > BRIGHTNESS TEMPERATURE
Data Format(s):
  • HDF5
Spatial Coverage:
N: 86.4, 
S: -86.4, 
E: 180, 
W: -180
Platform(s):SMAP
Spatial Resolution:
  • 47 km x 36 km
Sensor(s):SMAP L-BAND RADIOMETER
Temporal Coverage:
  • 31 March 2015 to 27 August 2020
Version(s):V4
Temporal Resolution49 minuteMetadata XML:View Metadata Record
Data Contributor(s):Piepmeier, J. R., P. Mohammed, J. Peng, E. J. Kim, G. De Amici, J. Chaubell, and C. Ruf.

Geographic Coverage

No access options.

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Piepmeier, J. R., P. Mohammed, J. Peng, E. J. Kim, G. De Amici, J. Chaubell, and C. Ruf. 2018. SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 4. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/VA6W2M0JTK2N. [Date Accessed].

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How To

Programmatic Data Access Guide
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FAQ

What are the latencies for SMAP radiometer data sets?
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. Short name Title Latency Required # days hh:mm:ss Actual (... read more
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Email: nsidc@nsidc.org