Orthogonal Resolution Analysis for Squint SAR Image
Conference: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06/06/2016 - 06/09/2016 at Hamburg, Germany
Proceedings: EUSAR 2016
Pages: 4Language: englishTyp: PDF
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Authors:
Sun, Bing (School of Electronics and Information Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191; Collaborative Innovation Center of Geospatial Technology, 129 Luoyu Road, Wuhan, 430079, China)
Xu, Hailun; Yang, Wei (School of Electronics and Information Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, China)
Wang, Ye (Beijing Institute of Remote Sensing Equipment,No.50,Yongding Road, Haidian District, Beijing 100854, China)
Abstract:
Resolution is one of the most important concept of SAR quality nowadays. For highly squinted SAR, the azimuth direction and range direction are no longer orthogonal. The conventional method to calculate resolution cannot reflect the real image quality correctly. Also it is difficult while evaluating the point target in SAR images. In this paper, we derive theoretical expressions of the azimuth and range resolution based on the general squinted SAR model and imaging algorithm, and construct a compensation phase expressions during imaging to obtain two orthogonal profiles. The simulation results validate the expressions of the resolutions and the compensation phase.