Motion compensation for high-resolution automobile-SAR

Motion compensation for high-resolution automobile-SAR
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高分辨率汽车SAR运动补偿

DOI:
10.1080/01431161.2014.930203
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发表时间:
2014-07
影响因子:
3.4
通讯作者:
Li Zhenfang
Li Zhenfang
中科院分区:
工程技术3区
文献类型:
--
作者:
Azouz Ahmed;Li Zhenfang

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研究了高分辨率汽车合成孔径雷达(SAR)航迹偏差的补偿问题。建立了获取汽车合成孔径雷达原始数据的几何模型。在此模型的基础上,研究了航迹偏差对最终聚焦图像质量的影响,并提出了运动补偿(MOCO)策略,可用于获得聚焦良好的SAR图像。介绍了如何利用惯性导航系统(INS)/全球定位系统(GPS)测量的速度和姿态角来获得天线相位中心(APC)的精确位置,并提出了一种将速度误差分解为两个分量分别进行补偿的新方法,即高阶和低阶相位补偿。最后,给出了实际数据的结果,以验证整个分析和所提出的方法。
This paper concerns the compensation of track deviations in high-resolution automobile synthetic aperture radar (SAR). We establish the geometry in which the automobile SAR raw data is acquired. Based on the derived model, the research investigates the impact of track deviations on the final focused image quality and we propose motion compensation (MOCO) strategy which can be applied to obtain a well-focused SAR image. This paper presents how to obtain the accurate positions of the antenna phase center (APC) using the velocity and attitude angles measured by inertial navigation system (INS)/global positioning system (GPS), and proposes a new method to compensate the forward velocity errors which are decomposed into two components and compensated individually, that is, high-order and low order phase compensation. Finally, the results from real data are presented to validate the whole analysis and the proposed procedure.
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发表时间: 2007-07-01
影响因子: 4.8
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