| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna pattern correction method for a synthetic aperture radar capable of acquiring a backward scattering coefficient more accurately by correcting the antenna pattern accurately even on an area having the greatly-changing ground surface altitude. SOLUTION: In this synthetic aperture radar loaded on a flying object and having an interferometric function, the altitude of an observation point is determined by interferometric processing, and a true antenna incident angle is determined by using the altitude information, to thereby correct an antenna gain, and to correct the antenna pattern by the change of the ground surface altitude. The interferometric processing may be executed by two antennas mounted on both sides of the airframe of an airplane flying at the altitude of about 10,000 meters. Polarimetric processing may be executed by utilizing polarized waves with each frequency of L band and X band. COPYRIGHT: (C)2004,JPO
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