机载双频曲线SAR系统与试验  

Airborne Dual-Frequency Curvilinear SAR System and Experiment

作　　者：陈乐平 安道祥 周智敏[1] 葛蓓蓓 李建鹏 李一石 CHEN Leping;AN Daoxiang;ZHOU Zhimin;GE Beibei;LI Jianpeng;LI Yishi(School of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《雷达科学与技术》2021年第3期248-257,共10页Radar Science and Technology

基　　金：湖南省自然科学基金(No.2020JJ5661)。

摘　　要：曲线合成孔径雷达(SAR)是一种孔径流形特殊的成像雷达,其所搭载平台通过作曲线运动,能观测到目标更多的方位散射信息、获取更高的空间分辨率,同时还具备一定的三维成像能力。随着成像技术的不断发展,机载曲线SAR在重点区域侦测相关任务中呈现广阔的应用前景。本文主要介绍了研究团队近年研制的机载双频曲线SAR系统,以及于2020年9月在陕西开展的一系列机载双频曲线SAR飞行试验。该系统能同时完成Ku波段三通道以及L波段双通道全极化数据采集工作,文中对曲线SAR中的高分辨成像、子孔径关联三维特征提取、曲线孔径干涉处理以及动目标跟踪检测等处理应用进行了介绍,并给出了实测数据处理结果,验证了系统性能和其可靠性。Curvilinear synthetic aperture radar(CLSAR)is an imaging radar with a special aperture.Through the curved motion of its platform,this kind of SAR can observe more azimuth scattering information of the target and obtain higher spatial resolution,as well as has a certain degree of 3D imaging capability.With the continuous development of imaging technology,airborne CLSAR has shown broad application prospects in key area detection related tasks.This article mainly introduces the airborne dual-frequency CLSAR system developed by our research team in recent years,and a series of airborne dual-frequency CLSAR flight tests carried out in Shaanxi in September 2020.The system can simultaneously complete Ku-band three-channel and L-band dual-channel full-polarization data acquisition work.The processing applications such as high-resolution imaging in CLSAR,sub-aperture correlation three-dimensional feature extraction,curved aperture interference processing,and moving target tracking and detection are introducted.The processing results of the measured data are given to verify the system performance and its reliability.

关 键 词：机载SAR 曲线SAR 双频段 试验 

分 类 号：TN957[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]