Data Set ID:

BYU Daily Browse Images of QuikSCAT Sigma-0 Measurements, Version 1

The SeaWinds on QuikSCAT scatterometer provides normalized radar cross section (sigma-0) measurements of the Earth's surface. While originally designed for wind observation, scatterometers have proven useful in a variety of land and ice studies. To aid in the selection of regions and time periods for study, Brigham Young University (BYU) has produced this global sigma-0 browse product. This product consists of spatial and temporal averages of QuikSCAT Level 1B sigma-0 values over one-day periods from 19 July 1999 to the present.

This data set consists of sigma-0 browse images for the entire globe, the northern hemisphere, and the southern hemisphere. The global images are rectangular latitude/longitude grids covering the entire globe with a resolution of 5 pixels/deg, or about 22.5 km/pixel at the equator. It suits mid-latitude regions but distorts polar regions. Hence, separate hemispheric products are created for high-latitude regions. Those images are polar stereographic projections using a 70 degree reference latitude with a nominal grid size of about 22.5 km. The polar views include only measurements above a high latitude cutoff of 52 degrees. These data are available via FTP, on CD-R and on 8 mm tape.

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NSIDC does not archive this data set. Please contact the data provider.

Geographic Coverage

Data Set Tabs

Temporal Coverage:
  • 1999-01-19
to present
Temporal Resolution:
1 day
Spatial Coverage:
  • N: 90, S: -90, E: 180, W: -180

Spatial Resolution:
  • 22.5 km x 22.5 km
  • Radar > Radar Backscatter
  • Radar > Sigma Naught
Data Format(s):
  • SIR
Data Contributor(s): David Long

We kindly request that you cite the use of this data set in a publication using the following citation. For more information, see Use and Copyright.

David G. Long 2000. BYU Daily Browse Images of QuikSCAT Sigma-0 Measurements, Version 1. [indicate subset used]. Pasadena, California USA. JPL: Jet Propulsion Laboratory.

Questions? Please contact:

NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA