Multi-Look Stripmap SAR Processing Algorithm with Built-In Correction of Geometric Distortions

Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany

Proceedings: EUSAR 2010

Pages: 4Language: englishTyp: PDF

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Bezvesilniy, Oleksandr O.; Gorovyi, Ievgen M.; Sosnytskiy, Sergiy V.; Vynogradov, Volodymyr V.; Vavriv, Dmytro M. (Department of Microwave Electronics, Institute of Radio Astronomy of NAS of Ukraine, Ukraine)

SAR systems installed on small aircrafts suffer from trajectory deviations and instabilities of antenna orientation. These kinds of motion errors lead to significant geometric distortions in SAR images. In the paper, we describe a time-domain multi-look stripmap SAR processing algorithm with built-in correction of geometric distortions. In the algorithm, the azimuth reference functions and range migration curves are specially designed to produce SAR images directly on a correct rectangular grid on the ground plane. The proposed technique has been successfully tested by using a Ku-band airborne SAR system.