摘要
图像配准是干涉合成孔径雷达(InSAR)信号处理的关键步骤。基于雷达几何的InSAR图像配准方法。利用主辅雷达成像几何和外部数字高程模型(DEM)进行主辅SAR图像配准。基于SAR图像距离多普勒定位方程,系统梳理了配准处理精度的影响因素,对各误差因素的作用机理进行了理论分析,并综合分析了该算法对重复航过和单次航过InSAR系统图像的配准处理性能。仿真结果验证了理论分析方法的有效性。分析结果对我国InSAR地面系统建设和相关卫星指标论证具有重要的支撑作用。
Image coregistration is one of the key steps in interferometric synthetic aperture radar(InSAR)processing.The image coregistration method based on radar geometry utilizes the multi-static SAR focusing geometry and coarse digital elevation model(DEM)to carry out InSAR image coregistration.Based on the SAR range-Doppler equations,this paper systematically analyzes the error sources of the co-registration algorithm.Then,the effects of the errors are studied theoretically in the first time.The performances of the algorithm on the repeated orbit and distributed InSAR are discussed comprehensively.Simulation results verify the validity of the theoretical analysis.This work can effectively support the development of InSAR processor and the satellite designation.
作者
路瑞峰
赵迪
侯雨生
陈重华
魏春
陈筠力
LU Ruifeng;ZHAO Di;HOU Yusheng;CHEN Chonghua;WEI Chun;CHEN Junli(Shanghai Institute of Satellite Engineering,Shanghai 201109,China;Laboratory of Target Microwave Properties,Deqing Academy of Satellite Applications,Huzhou 313200,Zhejiang,China)
出处
《上海航天》
CSCD
2018年第6期71-78,共8页
Aerospace Shanghai
基金
国家自然科学基金(61601298)
浙江省微波目标特性测量与遥感重点实验室开放基金(2018KF01
2018KF04)
关键词
干涉合成孔径雷达
图像配准
雷达几何
合成孔径雷达(SAR)距离多普勒方程
性能分析
interferometric synthetic aperture radar(InSAR)
image coregistration
radar geometry
synthetic aperture radar range-Doppler equations
performance analysis
