Airborne wind shear detection and alert system information
The airborne wind shear detection and alert system, fitted in an aircraft, detects and alerts the pilot both visually and aurally of a wind shear condition. A reactive wind shear detection system is activated by the aircraft flying into an area with a wind shear condition of sufficient force to pose a hazard to the aircraft. A predictive wind shear detection system is activated by the presence of a wind shear condition ahead of the aircraft. In 1988, the U.S. Federal Aviation Administration (FAA) mandated that all turbine-powered commercial aircraft must have on-board wind shear detection systems by 1993.[1] Airlines successfully lobbied to have commercial turbo-prop aircraft exempted from this requirement.[citation needed]
In the predictive wind shear detection mode, the weather radar processor of the aircraft detects the presence of a microburst, a type of vertical wind shear condition, by detecting the Doppler frequency shift of the microwave pulses caused by the microburst ahead of the aircraft,[2][3] and displays the area where it is present in the Navigation Display Unit (of the Electronic Flight Instrument System) along with an aural warning.
^"Making the Skies Safe from Windshear". www.nasa.gov. NASA. Retrieved 2019-08-10.
^Airborne Wind Shear Detection and Warning Systems. NASA Conference Publication 10050, Part 1. July 1990. p. 214. Retrieved 20 November 2022.
^Windshear Training Aid: 4.0 - Windshear Substantiating Data. Federal Aviation Administration. February 1987. p. 4.2-95. Retrieved 20 November 2022.
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