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631 NOUS40 KWBC 141544 FOS NOTICE NO. 942 08-14-96 TO WIND PROFILER DATA USERS THE 404 MHZ WIND PROFILER NETWORK OPERATED BY THE NATIONAL OCEANIC ATMOSPHERIC ADMINISTRATION S FORECAST SYSTEMS LABORATORY IN THE CENTRAL USA IS IMPLEMENTING A NEW QUALITY CONTROL ALGORITHM EFFECTIVE 0000 UTC AUGUST 15TH... 1996. A NEW ALGORITHM TO IDENTIFY ERRORS CAUSED BY MIGRATING BIRDS IN PROFILER WINDS ON AUGUST 15... 1996... A NEW QUALITY CONTROL /QC/ ALGORITHM WILL BE IMPLEMENTED ON THE HOURLY WINDS FROM THE NOAA PROFILER NETWORK /FORMERLY CALLED THE WIND PROFILER DEMONSTRATION NETWORK/. THE ALGORITHM IS DESIGNED TO FLAG WINDS THAT ARE SUSPECTED OF BEING BIASED IN WIND VELOCITY OR DIRECTION BY MIGRATING BIRDS. THE ALGORITHM IS APPLIED ONLY AT NIGHT... ONLY BELOW 4.5 KM ABOVE MEAN SEA LEVEL /BELOW ABOUT 570 MB OR 15...000 FEET/... AND ONLY DURING THE SPRING AND FALL MIGRATION PERIODS. NO CHANGE TO THE AFOS DISPLAY SOFTWARE FOR PROFILER DATA WILL BE NEEDED. WINDS SUSPECTED OF BEING BIASED BY MIGRATING BIRDS WILL BE IDENTIFIED WITH A 1 /QC CHECK FAILED OR NOT PERFORMED/ FLAG ON THE AFOS TIME-HEIGHT WIND DISPLAY. A MORE DETAILED DESCRIPTION WILL BE E-MAILED OR FAXED TO DIRECT SUBSCRIBERS TO THE FOS. END NNNN
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