Acoustic wide area air surveillance system

Details Acoustic wide area air surveillance system Acoustic wide area air surveillance system

2011-01-18

2011-01-18

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

Responsive to intruder energy

C367S124000

Reexamination Certificate

active

07872948

ABSTRACT:
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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