无先验模型复杂结构设施SAR全方位三维成像方法研究  

Research on Full-aspect Three-dimensional SAR Imaging Method for Complex Structural Facilities without Prior Model

作　　者：林赟 张琳[1] 韦立登[2] 张汉卿 冯珊珊 王彦平 洪文 LIN Yun;ZHANG Lin;WEI Lideng;ZHANG Hanqing;FENG Shanshan;WANG Yanping;HONG Wen(Radar Monitoring Technology Laboratory,School of Information,North China University of Technology,Beijing 100144,China;Beijing Institute of Radio Measurement,Beijing 100854,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Key Laboratory of Technology in Geo-Spatial Information Processing and Application System,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]北方工业大学信息学院雷达监测技术实验室,北京100144 [2]北京无线电测量研究所,北京100854 [3]中国科学院空天信息创新研究院,北京100094 [4]中国科学院空间信息处理与应用系统技术重点实验室,北京100190

出　　处：《雷达学报（中英文）》2022年第5期909-919,共11页Journal of Radars

基　　金：国家自然科学基金(61860206013,62131001);快速扶持项目(80913010302);北京市教育委员会创新团队建设计划(IDHT20190501)。

摘　　要：复杂结构设施的SAR三维成像是SAR成像领域的热点和难点问题。现有SAR三维成像依赖于高程方向的多通道或多次飞行,对雷达系统或数据获取的要求较高。该文提出无先验模型复杂结构设施三维成像方法,仅需一次飞行即可获得先验信息未知区域全场景全方位三维图像。该方法充分利用圆迹SAR的全方位观测、解叠掩和解高程模糊优势,无需目标预先建模和三维成像网格构建,适用于大面积区域复杂结构设施的精细三维成像,在雷达三维成像实用化技术方面取得了重要进展。通过该方法首次获得FAST射电望远镜的雷达全方位三维图像,验证了理论与方法的正确性与有效性。SAR three-Dimensional(3D)imaging of complex structural facilities is an important and challenging issue in SAR imaging.The existing 3D SAR imaging relies on multiple channels or flights in the elevation direction,exerting high demands on the radar system or data acquisition.This paper proposes a 3D imaging method for complex structural facilities without a prior model,and the full-aspect 3D image of the entire scene in the region with unknown prior information can be obtained solely using a single flight.This method completely utilizes the full-aspect observation as well as the layover and elevation ambiguity resolving capabilities of circular SAR without requiring target pre-modeling and 3D imaging grid construction.Moreover,the method is suitable for fine 3D imaging complex structural facilities in large areas.Significant progress has been made in the practical technology of radar 3D imaging.The full-aspect 3D radar images of the FAST radio telescope are obtained for the first time with the proposed method,thus verifying the correctness and effectiveness of our theory and method.

关 键 词：SAR三维成像 多角度SAR 全方位SAR 圆迹SAR 干涉SAR 

分 类 号：TN959[电子电信—信号与信息处理]