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Analysis on the azimuth shift of a moving target in SAR image 作者： Yang, Jiefang 1,2,3 Zhang, Yunhua 1,2 作者单位： 1. Key Laboratory of Microwave Remote Sensing, Chinese Academy of Sciences, Beijing, China 2. Center for Space Science, and Applied Research, Chinese Academy of Sciences, Beijing, China 3. University of Chinese Academy of Sciences, Beijing, China 提交时间： 2016-05-03 摘要: As we know, a moving target’s azimuth shift in synthetic aperture radar (SAR) image is proportional to the projected velocity of its across-track velocity in the slant-range plane. Therefore, we can relocate the moving target in SAR image after estimating its velocity. However, when the Doppler ambiguity occurs due to the limitation of the SAR system’s pulse repetition frequency (PRF), this relationship will not hold any more, in this case, we cannot relocate the moving target to the right position. The Doppler spectrum of a moving target with arbitrary velocity may entirely situate in a PRF band or span in two neighboring PRF bands. In this paper, we conduct a detailed theoretical analysis on the moving target’s azimuth shift for these two scenarios. According to the derived formulas, one can relocate a moving target with arbitrary velocity to the right position no matter the Doppler ambiguity occurs or not. Simulated data are processed to validate the analysis. © 2015 Electromagnetics Academy. All rights reserved. Synthetic aperture radar Velocity 期刊： Progress In Electromagnetics Research M 分类： 地球科学 >> 空间物理学 引用： ChinaXiv:201605.00305 (或此版本 ChinaXiv:201605.00305V1 ) doi:10.12074/201605.00305 CSTR:32003.36.ChinaXiv.201605.00305.V1 推荐引用方式： Yang, Jiefang,Zhang, Yunhua.(2016).Analysis on the azimuth shift of a moving target in SAR image.Progress In Electromagnetics Research M.[ChinaXiv:201605.00305] 版本历史 [V1] 2016-05-03 14:44:33 ChinaXiv:201605.00305V1 下载全文