大椭圆轨道SAR系统设计及关键技术研究  

Investigation on Highly-Elliptic Earth Orbital SAR System Design and Key Techniques

作　　者：姚佰栋[1] 盛磊[1] 孙光才[2] 谈璐璐[1] 吴浩 周子成[1] 王岩 YAO Baidong;SHENG Lei;SUN Guangcai;TAN Lulu;WU Hao;ZHOU Zicheng;WANG Yan(The 38th Research Institute of China Electronics Technology Group Corporation, Hefei 230088, China;National Key Lab of Radar Signal Processing,Xidian University, Xi’an 710071, China)

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088 [2]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《雷达科学与技术》2020年第4期373-380,共8页Radar Science and Technology

基　　金：国家科技部国际合作专项(No.2015DFA10270)。

摘　　要：大椭圆轨道SAR(Highly-Elliptic Earth Orbital SAR)作为低轨SAR(LEOSAR)、中高轨SAR(MEOSAR、HEOSAR)的结合,具有观测范围广、时间分辨率高的特点,是非常具有应用前景的新型SAR系统。本文根据大椭圆轨道SAR的系统特点及优势,对大椭圆轨道SAR系统设计中的成像体制选择、工作参数选择、成像模式设计等进行了论述。针对大椭圆轨道SAR系统存在的特殊问题,对大椭圆轨道SAR的关键技术问题进行分析,提出了针对上升/下降时段、远地时段观测特点的高精度成像算法,并对大椭圆轨道SAR天线和空间环境适应性设计难点进行了总结。这些研究结果为大椭圆轨道SAR系统实现及应用提供有益参考。Highly-elliptic earth orbital SAR is a very promising spaceborne SAR system for earth observation,which is a combination of LEOSAR,MEOSAR and HEOSAR for its powerful and flexible observation capability.Concepts and system design considerations of highly-elliptic earth orbital SAR are investigated and some technology challenges are discussed in this paper.The imaging algorithms for ascending/descending and apogee period are also proposed.Moreover,the difficulties of antenna design and space environment adaptability are discussed.The investigation can provide useful reference for the highly-elliptic earth orbital SAR system design and applications.

关 键 词：大椭圆轨道SAR 系统设计 成像算法 空间环境适应性 

分 类 号：TN958[电子电信—信号与信息处理]