CLPX-Satellite: SSM/I Brightness Temperature GridsEntry ID: NSIDC-0144
Abstract: This data set includes Defense Meteorological Satellite Program (DMSP) F-13 passive microwave brightness temperatures gridded to the geographic (lat/long) and UTM grids of the Cold Land Processes Field Experiment (CLPX) Large Regional Study Area (LRSA). Data are provided for passive microwave frequencies at 19, 22, 37 and 85 GHz, separated by ascending and descending satellite passes, and include ... time files. Grid resolution is 25 km, which approximates the sampling resolution of the original swath data. Backus-Gilbert optimal interpolation is used to artificially increase (16 times) the density of brightness temperature measurements in the satellite swath reference frame. This process uses actual antenna patterns to create the oversampled array, and the net effect is as if the additional samples had been made by the satellite radiometer itself, i.e., the beam patterns and spatial resolutions of the interpolated data approximate those of the original samples. This method is based on the earlier work of Galantowicz and England (1991) and Poe (1990). Please see the documentation for the global version of this data set for complete details. Please see the documentation for the global version of this data set at http://nsidc.org/data/nsidc-0032.html for complete details. Several things about this data set that are different: 1) Temporal coverage is limited to 1 February - 31 March 2002 and 1 February - 31 March 2003. 2) The projection/grid is not EASE-Grid, it is CLPX lrsa_geo720.0 and lrsa_utm25000. However, interpolation is Backus-Gilbert, so all the benefits of this interpolation are shared with the global data set. 3) Filenames are different. 4) CLPX grid dimensions are: GEO720.0: 23 cols by 18 rows UTM25000: 17 cols by 17 rows 5) Grid resolution for CLPX is limited to the CLPX grids that approximate 25 km.
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Data Set Citation
Dataset Originator/Creator: M.J. Brodzik
Dataset Title: CLPX-Satellite: SSM/I Brightness Temperature Grids
Dataset Release Date: 2003-11-01
Dataset Release Place: Boulder, CO, USA
Dataset Publisher: National Snow and Ice Data Center (NSIDC)Online Resource: http://nsidc.org/data/nsidc-0144
Start Date: 2002-02-01Stop Date: 2002-05-31
Start Date: 2003-02-01Stop Date: 2003-05-31
Latitude Resolution: UTM25000: 25000m
Longitude Resolution: UTM25000: 25000m
ISO Topic Category
Quality High. The resampled data uses all available information about the radiomenter antenna pattern to interpolated a brightness temperature as if the radiometer itself were pointing to the center of each gridded cell.
Access Constraints None.
Use Constraints None.
Data Set Progress
Distribution Media: ftp
Distribution Size: 30 MB (uncompressed), 2.3 MB (compressed)
Distribution Format: binary
Email: William.D.Pesnell at nasa.gov
SDO Project Scientist - Goddard Space Flight Center
Role: DIF AUTHOR
Email: Scott.A.Ritz at nasa.gov
NASA Goddard Space Flight Center Global Change Master Directory
Province or State: Maryland
Postal Code: 20771
Please link for a complete list of SDO publications:
Creation and Review Dates
DIF Creation Date: 2010-09-24
Last DIF Revision Date: 2012-02-01