Resolution Analysis of Circular SAR with Partial Circular Aperture Measurements

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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Kou, Leilei (Graduate University of Chinese Academy of Sciences, China)
Wang, Xiaoqing; Zhu, Minhui; Chong, Jinsong; Xiang, Maosheng (National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, CAS, China)

Radar resolution is considered for the targets near-axis with circular synthetic aperture measurements. Circular SAR (CSAR) imaging with partial circular apertures is used in many practical applications and laboratory experiments, but its resolution is hardly investigated. In this paper, an analytic expression is derived for the spatial resolution for a circular aperture of less than 360 degrees, and the general result can be applied to the special case that CSAR imaging is made with full apertures. Unlike CSAR imaging with full apertures, the ground plane resolution cell area of partial apertures will be an ellipse instead of a circle.