Passive aircraft monitoring system

Details Passive aircraft monitoring system Passive aircraft monitoring system

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G08G 5/00 (2006.01) G01S 1/14 (2006.01) G01S 5/02 (2006.01) G01S 11/10 (2006.01) G01S 13/91 (2006.01) G01S 13/92 (2006.01)

Patent

CA 2095367

A passive aircraft monitoring system (20) receives signals transmitted by an instrument landing system (14, 16) and reflected from aircraft (18). The Doppler shift in the reflected signals is used to calculate the ground speed and range of the aircraft. Using ILS 90 and 150 Hz signals reflected from the aircraft and comparing their magnitude, the altitude and lateral position of the aircraft can also be determined.

L'invention est un système passif de surveillance d'aéronefs (20) qui reçoit des signaux transmis par un système d'atterrissage aux instruments (14,16) et réfléchis par un aéronef (18). Le décalage de Doppler dans les signaux réfléchis est utilisé pour calculer la vitesse sol et la distance de l'aéronef. En utilisant des signaux à 90 et à 150 Hz produits par un système d'atterrissage aux instruments et réfléchis par l'aéronef et en comparant leurs intensités, on peut également déterminer l'altitude et la position latérale de l'aéronef.

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