Abstract
A conventional Radar Acoustic Sounding System atmospheric proe ler has been converted into a wake vortex sensor that can detect, track, and measure aircraft wake vortices under all weatherconditions. The resulting wake vortex sensor has been operated automatically with real-time processing at New York’ s Kennedy International Airport,wherewakesfromaircraftinallweightclassesweredetected.Comparisonswithotherwakevortexsensors are presented and show consistent vortex tracking with a very low false alarm rate. Possible applications of the sensor to wake vortex avoidance systems are discussed. I. Introduction A IRCRAFT wake vortices may be dangerous to following aircraftduringlandingandtakeoff.Sincetheadventofjumbojets in the 1970s, the Federal Aviation Administration (FAA) imposed three- to six-mile minimum spacings between leader and follower aircraft, depending on aircraft weight category. These spacings are overly conservative most of the time, causing airport delays and reduced capacity, particularly in bad weather. Based on simulations, 1 the FAAhas projected airlinesavings of $5billion a yearif spacings could be safely reduced by 30 s during high airport trafe c periods (because vortices often decay quickly or are rapidly moved out of the glide path by crosswinds ).
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