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TCAS: Maneuvering Aircraft in the Horiwntal Plane

By Douglas W Burgess, Sylvia Altman and M. Loren Wood

Abstract

operating in all commercial airline aircraft to reduce the risk ofmidair collisions. TCAS II determines the relative positions ofnearby aircraft, called intruders, by interrogating their transponders and receiving their replies. An intruder deemed a potential threat will trigger a resolution advisory (RA) that consists of an audible alert and directive that instructs the pilot to execute a vertical avoidance maneuver. Lincoln Laboratory has investigated the possibility ofincreasing the capability ofTCAS II by incorporating the horizontal maneuvering ofaircraft. Horizontal RAs can be computed if the intruder horizontal miss distances at closest approach are lrnown. Horizontal miss distances can be estimated with range and bearing measurements ofintruders. "With this method, however, large errors in estimating the bearing rates will result in large errors in calculating the horizontal miss distances. An improved method of determining the horizontal miss distances may be to use the Mode S data link to obtain state data (position, velocity; and acceleration) from intruder aircraft

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.186.1668
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