Communications: electrical – Aircraft alarm or indicating systems – Nonalarm flight indicator
Reexamination Certificate
2011-03-01
2011-03-01
Pham, Toan N (Department: 2612)
Communications: electrical
Aircraft alarm or indicating systems
Nonalarm flight indicator
C340S977000, C340S945000, C340S951000, C356S622000, C356S916000
Reexamination Certificate
active
07898435
ABSTRACT:
A system and method uses light signals to detect and display the position of an airborne vehicle, such as a helicopter, during takeoff or landing or low speed, low altitude operation. A transmitter on the vehicle emits light signals while an optical receiver retrieves reflected light signals. Using light detection and ranging techniques, various parameters, such as altitude, ground speed and relative wind, are calculated based on the Doppler shift within the reflected light signals. The signals are transmitted in three different directions to facilitate the measurements of different Doppler shifts. The parameters are also displayed on a screen or other visual device within the vehicle.
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Gatchell Peter A.
Mamidipudi Priyavadan
Rogers Philip L.
Optical Air Data Systems, LLC
Pham Toan N
Sterne Kessler Goldstein & Fox P.L.L.C.
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