Entry_ID: NSIDC-0144
Entry_Title: CLPX-Satellite: SSM/I Brightness Temperature Grids
Group: 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
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Mary J.
   Last_Name: Brodzik
   Email: brodzik@nsidc.org
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
   End_Group
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Brightness Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Brightness Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Microwave Imagery
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Microwave Imagery
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Microwave Radiance
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Microwave Radiance
End_Group
Keyword: Passive Microwave
Keyword: Passive Microwave Brightness Temperatures
Keyword: Passive Microwave Data
Keyword: Passive Microwave Radiation
Sensor_Name: SSM/I > Special Sensor Microwave/Imager
Source_Name: DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
Group: Temporal_Coverage
   Start_Date: 2003-02-01
   Stop_Date: 2003-05-31
End_Group
Group: Temporal_Coverage
   Start_Date: 2002-02-01
   Stop_Date: 2002-05-31
End_Group
Data_Set_Progress: in work
Group: Spatial_Coverage
   Southernmost_Latitude: 38.5
   Northernmost_Latitude: 42
   Westernmost_Longitude: -108.5
   Easternmost_Longitude: -104
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Location_Subregion1: UNITED STATES OF AMERICA
   Detailed_Location: COLORADO, WYOMING
End_Group
Group: Data_Resolution
   Latitude_Resolution: UTM25000: 25000m
   Longitude_Resolution: UTM25000: 25000m
End_Group
Group: Data_Resolution
   Latitude_Resolution: GEO720.0: 0.2 degrees
   Longitude_Resolution: GEO720.0: 0.2 degrees
End_Group
Project: CLPX > Cold Land Processes Field Experiment
Group: 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.

End_Group
Access_Constraints: None.
Use_Constraints: None.
Data_Set_Language: English
Group: Data_Center
   Data_Center_Name: NASA DAAC > NASA DAAC at the National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org/daac/index.html
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 2.3 - 30 MB
   Distribution_Format: Binary
End_Group
Group: 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.

End_Group
Group: 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.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/clpx/
   Description: CLPX Site
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/forms/nsidc0112.html
   Description: Register as a CLPX user
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0032.html
   Description: DMSP SSM/I Pathfinder Daily EASE-Grid Brightness Temperatures
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2003-11-01
Last_DIF_Revision_Date: 2013-07-18
DIF_Revision_History:  changed creator role from author to editor