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Data Set ID:
NSIDC-0464

Enhanced-Resolution SSM/I and AMSR-E Daily Polar Brightness Temperatures, Version 1

This data set contains enhanced-resolution brightness temperatures produced using the Scatterometer Image Reconstruction (SIR) algorithm developed by the Microwave Earth Remote Sensing (MERS) group at Brigham Young University (BYU). Enhanced-resolution brightness temperature images for the Arctic and Antarctic were generated using antenna temperature data from the Special Sensor Microwave/Imager (SSM/I) and the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument. SSM/I images are available for 1995 through 2008, and AMSR-E images are available for 2002 through 2010. All available measurements for a single day are averaged into twice-daily gridded files for three different equal-area spatial coverages: Northern Hemisphere, Southern Hemisphere, and full global. The spatial resolution is 12.5 km for SSM/I channels 19 and 22 GHz, 7.5 km for 37 GHz, and 2.5 km for the 85 GHz channel. For AMSR-E, the resolution is 12.5 km for the 6, 10, 18, and 23 GHz channels; 7.5 km for the 36 GHz channel; and 2.5 km for the 89 GHz channel. Software for reading the SIR-formatted SSM/I and AMSR-E data is also available. As scatterometer and radiometer data complement each other, these enhanced-resolution radiometer data, together with SIR format scatterometer data available from BYU, will facilitate polar research that combines information from both radiometers and scatterometers. Data are stored as scaled 2-byte integers in binary arrays with a 512-byte header and are available via FTP.

Geographic Coverage

Spatial Coverage:
  • N: 90, S: 30, E: 180, W: -180

  • N: -39, S: -90, E: 180, W: -180

Spatial Resolution:
  • 12.5 km x 12.5 km
  • 2.5 km x 2.5 km
  • 7.5 km x 7.5 km
Temporal Coverage:
  • 1 January 2002 to 1 October 2011
  • 1 January 1995 to 31 December 2008
Temporal Resolution: 12 hour
Parameter(s):
  • Microwave > Brightness Temperature
Platform(s) AQUA, DMSP 5D-2/F13
Sensor(s): AMSR-E, SSM/I
Data Format(s):
  • Binary
  • GIF
Version: V1
Data Contributor(s): David Long, Julienne Stroeve

Data Citation

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.

Long, D. G. and J. Stroeve. 2011. Enhanced-Resolution SSM/I and AMSR-E Daily Polar Brightness Temperatures, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: http://dx.doi.org/10.5067/MES22DNFS3O8. [Date Accessed].
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