Method of detecting objects that change with time by means of a SAR radar
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United States of America Patent
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Oct 15, 2002
Grant Date -
N/A
app pub date -
Aug 24, 2001
filing date -
Feb 26, 1999
priority date (Note) -
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Abstract
A method of detecting, by means of a SAR radar, objects that change with time within a ground area. The SAR radar is supported by a platform in essentially rectilinear motion during a synthetic aperture and the ground area is reproduced at least twice in succession from different synthetic apertures. A two-dimensional SAR image is generated from each synthetic aperture. The SAR images are matched with each other by a method in which each image position in one image is associated with the same ground area in the other image, the images being filtered, knowing location data for the antennae and based on the fact that the cylinder geometry of the SAR images is projected onto the ground surface, so that only common spectral components of the reflectivity of the ground are extracted and used in the matching.
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