A Low level windshear alert system (LLWAS) measures wind speed and direction at remote sensor station sites situated around an airport.Each equipped airport may have as few as 6 or as many as 32 remote
anemometer stations. The remote sensor data received is transmitted to a master station, which generates warnings when
windshear or
microburst conditions are detected. Current wind speed and direction data and warnings are displayed for approach controllers in the
Terminal Radar Approach Control Facility (TRACON) and for ground controllers in the
Air Traffic Control Tower (ATCT).
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