机载多维度SAR误差分析与成像自配准处理方法  

Error Analysis and Auto-Registration Imaging Method for Airborne Multidimensional Space Joint-Observation SAR

作　　者：仇晓兰[1,2,3,5] 程遥 高铭 焦泽坤 周良将 丁赤飚[1,3,4,5,6] QIU Xiaolan;CHENG Yao;GAO Ming;JIAO Zekun;ZHOU Liangjiang;DING Chibiao(National Key Lab of Microwave Imaging Technology, Beijing 100190, China;Key Laboratory of Intelligent Aerospace Big Data Application Technology, Suzhou 215124, China;Suzhou Aerospace Information Research Institute, Suzhou 215124, China;Qilu Aerospace Information Research Institute, Jinan 250132, China;Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]微波成像技术国家重点实验室,北京100190 [2]苏州市空天大数据智能应用技术重点实验室,江苏苏州215124 [3]苏州空天信息研究院,江苏苏州215124 [4]齐鲁空天信息研究院,山东济南250132 [5]中国科学院空天信息创新研究院,北京100190 [6]中国科学院大学,北京100049

出　　处：《雷达科学与技术》2021年第5期571-582,共12页Radar Science and Technology

基　　金：国家自然科学基金(No.61991421,62022082)。

摘　　要：随着机载SAR技术发展,在同一架飞机上可以同时安装多个波段的全极化SAR载荷,形成机载多维度SAR系统。中科院空天院牵头研制了一部机载多维度SAR系统,并采用统一的频率源作为基准,以保证不同波段SAR之间在时间、相位方面的一致性,开展了数据获取实验。本文分析了该机载多维度SAR在采样延迟、方位时间和运动补偿等方面的误差,并提出了一致性校正和成像处理的方法,实现了无需后续图像匹配的成像自配准。机载多维度SAR实验数据处理结果表明,多波段成像自配准精度达到1个像素以内,为后续多维度SAR数据联合分析提供了良好的基础。With the development of airborne SAR technology,multi-band fully-polarized SAR payloads can be installed on the same aircraft to form an airborne multidimensional space joint-observation SAR(MSJosSAR)system.Aerospace Information Research Institute,Chinese Academy of Sciences(AIRCAS)led the development of an airborne MSJosSAR system and carried out data acquisition experiments.In order to ensure the consistency of time and phase between radars of different bands,a unified frequency source was used as the reference source.In this paper,the sampling delay,azimuth time and motion compensation residual errors of the airborne MSJosSAR are analyzed,and an error compensation and auto-registration imaging method is proposed.The airborne MSJosSAR data processing results show that the accuracy of multi-band imaging auto-registration is within one pixel,which provides a good foundation for the subsequent MSJosSAR data joint analysis.

关 键 词：多维度SAR 机载SAR SAR成像 多波段SAR 多极化SAR 

分 类 号：TN957.52[电子电信—信号与信息处理]