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The Johns Hopkins University / Applied Physics Laboratory University Partnering for Operational Support NOAA/NESDIS Map of last 10 datatakes. The darker the red, the more recent
data.
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provided Latest ImagesProject Description Blended wind product consisting of high-resolution wind speed estimates derived from RADARSAT-1 synthetic aperture radar images. Wind directions from NOGAPS (column 3), a SAR-technique (column 5 when available) and the Air Force Weather Agency's (AFWA) operational numerical weather prediction output (column 7). In this demonstration, theaters T01 (Alaska) and T02 (CONUS) of the MM5 operational output are used. The wind maps shown below are derived using the operational SAR wind speed processor developed at APLmodified to handle mesoscale model winds. The RADARSAT-1 images are provided courtesy of National Oceanic and Atmospheric Administration under a project called The Alaska SAR Demonstration Project . Wind speed resolution ranges from 100 m for the Standard Beam imagery to 500 m for the ScanSAR Wide mode imagery. NOTE:
Begining March 1, 2005 the scatterometer algorithm used in
operational processing was changed from CMOD4 to CMOD5. CMOD5
provides better estimates at high winds (> 20 m/s). One issue with
the new model function is that there are times,
particularly at higher wind speeds, that two wind speeds are retrieved.
At this point, we are only reporting the lower wind speed. This
approach seems adequate, but we would appreciate feed back on any
anomalies you might notice in the wind images —
Nathaniel.Winstead@jhuapl.edu March 16, 2005 For information on SAR see: SAR
Meteorology Archive by Year and Month
This page last updated on Thu 26 Dec 2002 10:00 AM EST. |
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