Demonstration of Aircraft Localization by TDOA, AOA, and Barometric Altitude at Two Sites

Aircraft localization systems that use time difference of arrival (TDOA) measurements, called wide-area multilateration (WAM) systems, have been deployed for air traffic control. Although WAM performs better than radar, it requires a large number of ground stations. A possible solution by which to reduce the number of stations is to obtain additional measurements, such as the angle of arrival (AOA) and barometric altitude. However, the feasibility of hybrid localization has not been experimentally proven. Therefore, this study presents an experiment on aircraft localization using TDOA, AOA, and barometric altitude measurements to demonstrate that aircraft localization at only two sites is possible.