Method of evaluating the image quality of a synthetic aperture radar

摘要

An active reflector (12) including an antenna (13), a frequency converter (15), and a delay circuit (16) is placed at a location within an area to be detected by a synthetic aperture radar (11). The active reflector (12) receives an incoming radio wave emitted by the synthetic aperture radar (11) and changes its frequency or delay time. The resultant radio wave is transmitted as a reflected radio wave toward the synthetic aperture radar (11). As a result, the position of the active reflector image displayed on the screen of the synthetic aperture radar (11) is shifted. The ambiguity is detected qualitatively from the pixel value at the original display position at which the active reflector image was displayed it was shifted, thereby evaluating the image quality of the synthetic aperture radar.