机载双频曲线SAR系统与试验

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。

Airborne Dual-Frequency Curvilinear SAR System and Experiment

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.