960814: ADMIN NOTICE KWBC (fwd)

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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.
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