星源照射双/多基地SAR成像

星源照射双/多基地合成孔径雷达(SAR)，采用卫星发射，卫星、临近空间、飞机、地面等平台接收，实现对地海面场景和目标的高分辨成像。该技术具有可成像范围广、隐蔽性好、抗干扰能力强等优点，且可以通过波束调控实现扫描、聚束、滑动聚束等多种组合成像模式，从而获取更加丰富的成像信息，具有十分广阔的民用和军事应用前景。目前，国内外针对星源照射双/多基地SAR成像技术开展了多年的研究，积累了诸多研究成果。该文分别从系统组成、构型方法、回波模型、成像方法、收发同步与试验验证等方面对该技术进行阐述与分析，同时对相关的研究工作进行较系统的回顾，并展望了星源照射双/多基地SAR成像技术未来的发展方向。

Bi/multi-static Synthetic Aperture Radar Using Spaceborne Illuminator

Bi/multistatic Synthetic Aperture Radar (SAR) using spaceborne illuminator utilizes spaceborne platforms as transmitters and satellites, near-space vehicles, aircraft, and ground platforms as receivers, which allows high-resolution imaging of ground and marine scenes and targets. The system’s benefits include a broad imaging field of view, high concealment, and potent antijamming abilities. By using beam steering methods, a variety of imaging modes can be achieved, such as staring spotlight and sliding spotlight modes, which obtain abundant information about the imaging scene and offer broad application prospects both in civil and military fields. Thus far, the bi/multistatic SAR using spaceborne illuminator has been intensively investigated, and several research findings have been reported. This paper examines the technology from the aspects of system components, configuration design, echo model, imaging techniques, bistatic synchronization, and experimental verification and systematically reviews the state-of-the-art research progress. Finally, it is anticipated that spaceborne illuminator technology will be used to develop bi/multistatic SAR in the future.