Method of evaluating the image quality of a synthetic aperture radar
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United States of America Patent
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-
Apr 30, 1996
Grant Date -
N/A
app pub date -
Feb 16, 1995
filing date -
Mar 8, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An active reflector including an antenna, a frequency converter, and a delay circuit is placed at a location within an area to be detected by a synthetic aperture radar. The active reflector receives an incoming radio wave emitted by the synthetic aperture radar and changes its frequency or delay time. The resultant radio wave is transmitted as a reflected radio wave toward the synthetic aperture radar. As a result, the position of the active reflector image displayed on the screen of the synthetic aperture radar is shifted. The ambiguity is quantitatively detected from the pixel value at the original display position at which the active reflector image was displayed before it was shifted, thereby evaluating the image quality of the synthetic aperture radar.
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