The Boeing Company

Henry Hooper Davis

Richard Ove Nielsen

Paul Dunholter

Kevin Dale Balmforth

Jonathan S Lee

The different advantageous embodiments provide a method and apparatus for detecting an aircraft. The different advantageous embodiments may provide a method for detecting an acoustic emission emitted by the aircraft using a number of acoustic sensors to form a detected acoustic emission. The aircraft may be identified from the detected acoustic emission to form an identified aircraft. A bearing may be estimated for the identified aircraft using the detected acoustic emission.

Acoustic airport surveillance system

A method and apparatus for detecting an aircraft. The method is provided for wide area tracking of aircraft. An acoustic emission of the aircraft is detected from a plurality of locations. A position of the aircraft at a set of times is estimated by comparing a set of harmonically related Doppler shifted frequencies for the acoustic emission to an expected zero Doppler shifted frequency of the aircraft to form an estimated position. The position of the aircraft and a heading of the aircraft are tracked using the estimated position. The aircraft type is classified based on the corresponding set of zero Doppler frequencies at each acoustic sensor.

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Irvine, CA, United States of America

Henry Hooper Davis