① 中国科学院电子学研究所 北京 100190;
② 微波成像技术重点实验室 北京 100190;
③ 中国科学院大学 北京 100190;
④ 内蒙古工业大学信息工程学院 呼和浩特 010051;
⑤ 中国安全生产科学研究院 北京 100012
Yaw Angle Error Compensation for Airborne 3-D SAR Based on Wavenumber-domain Subblock
Ding Zhen-yu①②③, Tan Wei-xian④, Wang Yan-ping⑤, Hong Wen①②, Wu Yi-rong①②
① Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
② Key Laboratory of Science and Technology on Microwave Imaging, Beijing 100190, China;
③ University of Chinese Academy of Sciences, Beijing 100190, China;
④ College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
⑤ China Academy of Safety Science and Technology, Beijing 100012, China
Airborne array antenna SAR is used to obtain three-dimensional imaging; however it is impaired by motion errors. In particular, rotation error changes the relative position among the different antenna units and strongly affects the image quality. Unfortunately, the presently available algorithm can not compensate for the rotation error. In this study, an airborne array antenna SAR three-dimensional imaging model is discussed along with the effect of rotation errors, and more specifically, the yaw angle error. The analysis reveals that along- and cross-track wavenumbers can be obtained from the echo phase, and when used to calculate the range error, these wavenumbers lead to a target position irrelevant result that eliminates the error's spatial variance. Therefore, a wavenumber-domain subblock compensation method is proposed by computing the range error in the subblock of the along- and cross-track 2-D wavenumber domain and precisely compensating for the error in the space domain. Simulations show that the algorithm can compensate for the effect of yaw angle error.
丁振宇, 谭维贤, 王彦平, 洪文, 吴一戎. 基于波数域子孔径的机载三维SAR偏航角运动误差补偿[J]. 雷达学报, 2015, 4(4): 467-473.
Ding Zhen-yu, Tan Wei-xian, Wang Yan-ping, Hong Wen, Wu Yi-rong. Yaw Angle Error Compensation for Airborne 3-D SAR Based on Wavenumber-domain Subblock. JOURNAL OF RADARS, 2015, 4(4): 467-473.
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2015, Vol. 4 
