CLPX-Satellite: SSM/I Brightness Temperature Grids

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Entry ID

NSIDC-0144

Summary

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.

Geographic Coverage

 

Spatial Coordinates:
N: 42°     S: 38.5°     E: -104°     W: -108.5°    

Data Set Citation

Dataset Creator: Brodzik, M. (ed.).
Dataset Title: CLPX-Satellite: SSM/I Brightness Temperature Grids
Dataset Release Date: 2003-11-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0144.html

Temporal Coverage

Start Date: 2003-02-01
Stop Date: 2003-05-31

Start Date: 2002-02-01
Stop Date: 2002-05-31

Data Resolution

Latitude Resolution: UTM25000: 25000m
Longitude Resolution: UTM25000: 25000m

Latitude Resolution: GEO720.0: 0.2 degrees
Longitude Resolution: GEO720.0: 0.2 degrees

Location Keywords

  • CONTINENT NORTH AMERICA
  • CONTINENT NORTH AMERICA UNITED STATES OF AMERICA COLORADO, WYOMING

Science Keywords

  • Spectral/Engineering Microwave Brightness Temperature
  • Spectral/Engineering Microwave Brightness Temperature
  • Spectral/Engineering Microwave Microwave Imagery
  • Spectral/Engineering Microwave Microwave Imagery
  • Spectral/Engineering Microwave Microwave Radiance
  • Spectral/Engineering Microwave Microwave Radiance

Ancillary Keywords

  • Passive Microwave
  • Passive Microwave Brightness Temperatures
  • Passive Microwave Data
  • Passive Microwave Radiation

Platform

  • DMSP 5D-2/F13 Defense Meteorological Satellite Program-F13

Instrument

  • SSM/I Special Sensor Microwave/Imager

Project

  • CLPX Cold Land Processes Field Experiment

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

in work

Data Center

NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Size: 2.3 - 30 MB
Distribution Format: Binary

Personnel

Mary J. Brodzik
Role: INVESTIGATOR
Email: brodzik@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Related URL

VIEW PROJECT HOME PAGE
CLPX Site

VIEW PROJECT HOME PAGE
Register as a CLPX user

VIEW RELATED INFORMATION
DMSP SSM/I Pathfinder Daily EASE-Grid Brightness Temperatures

Reference

Armstrong, R.L., K.W. Knowles, M.J. Brodzik and M.A. Hardman. 1994, updated 2003. DMSP SSM/I Pathfinder daily EASE-Grid brightness temperatures. Boulder, CO: National Snow and Ice Data Center. Digital media and CD-ROM.

Galantowicz, J.F., England, A. W. 1991. The Michigan Earth Grid: Description, Registration Method for SSM/I Data, and Derivative Map Projections. Radiation Laboratory, Department of Electrical Engineering and Computer Science, Technical Report 027396-2-T. University of Michigan, Ann Arbor.

Galantowicz, J.F. 1995.Microwave Radiometry of Snow-Covered Grasslands for the Estimation of Land-Atmosphere Energy and Moisture Fluxes. PhD Thesis, Department of Electrical Engineering and Computer Science and Department of Atmospheric, Oceanic, and Space Sciences. University of Michigan, Ann Arbor.

Poe, G. A. 1990. Optimum interpolation of imaging microwave radiometer data. IEEE Trans. Geosci. Remote Sensing GE-28:800-810.

Stogryn, A. 1978. Estimates of brightness temperatures from scanning radiometer data. IEEE Trans. Antennas Propagat. AP-26:720-726.

Wentz, F. J. 1993. User's Manual SSM/I Antenna Temperature Tapes, Revision 2. Remote Sensing Systems Technical Report 120193. Santa Rosa, CA. 13 p.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2003-11-01
Last DIF Revision Date: 2013-07-18

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