星载高分宽幅SAR技术发展趋势分析  

Analysis on Development Trend of Spaceborne High-resolution Wide-swath SAR Technology

作　　者：张润宁[1] 王旭莹 王志斌 ZHANG Running;WANG Xuying;WANG Zhibin(Institute of Remote Sensing Satellite,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院遥感卫星总体部,北京100094

出　　处：《航天器工程》2022年第1期1-9,共9页Spacecraft Engineering

摘　　要：分辨率和测绘带是星载合成孔径雷达(SAR)技术的两个重要指标,传统星载SAR由于最小天线面积的限制,不能同时实现方位向高分辨率和距离向宽测绘带。文章分析了星载SAR在同时实现高分和宽幅成像方面的固有约束以及传统SAR体制的局限性,分析比较了实现高分宽幅的新体制的技术特点、系统代价以及涉及的关键技术,从卫星总体角度分析了高分宽幅成像对卫星平台能源、数传等支撑能力的需求,并对未来高分宽幅SAR技术体制的发展方向进行了展望。Resolution and swath are width two important indicators of spaceborne synthetic aperture radar(SAR)technology.Due to the limitation of minimum antenna area,traditional spaceborne SAR cannot achieve a high resolution in azimuth and a wide swath in range at the same time.In this paper,the inherent restrictions of spaceborne SAR in realizing high-resolution wide-swath imaging at the same time and the limitations of traditional SAR system are analyzed.The technical characteristics,system costs and key technologies involved in the new system are compared.The requirements of high-resolution wide-swath imaging on the support capacity of satellite platform such as energy and data transmission are analyzed from the perspective of satellite system engineering,and the development direction of future high-resolution wide-swath SAR system is prospected.

关 键 词：星载SAR 高分辨率宽测绘带SAR成像 数字波束形成 

分 类 号：TN958[电子电信—信号与信息处理]