Wide area high resolution SAR from a moving and hovering...

Details Wide area high resolution SAR from a moving and hovering... Wide area high resolution SAR from a moving and hovering...

2007-08-20

2010-06-01

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

C342S02500R, C342S005000

Reexamination Certificate

active

07728756

ABSTRACT:
A hovering helicopter has a radar transmitter/receiver for transmitting radar pulses for illuminating a target for SAR imaging, and rotor blades for generating lift. Radar reflectors are on the rotor blades. The radar reflectors are oriented to reflect the radar pulses from the transmitter to the target as the rotor blades rotate. The radar pulses reflected by the moving reflector from the transmitter are timed to generate the synthetic aperture image using radar returns from the target. The receiver also receives blade returns directly reflected from the moving reflectors attached to the lift rotor blades. The receiver analyzes the blade returns to extract motion details of the reflectors and uses the motion details for motion compensation of target returns for SAR imaging.

REFERENCES:
patent: 3787862 (1974-01-01), Jacobson
patent: 6054947 (2000-04-01), Kosowsky
patent: 6509862 (2003-01-01), Klausing et al.
patent: 6542110 (2003-04-01), Lohner et al.
patent: 6914554 (2005-07-01), Riley et al.
patent: 6925382 (2005-08-01), Lahn
patent: 7528762 (2009-05-01), Cerwin
patent: 60170777 (1985-09-01), None

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