摘要
方位向电扫描SAR(Terrain Observation by Progressive Scans,TOPSAR)是星载SAR的一种全新工作模式,这种工作模式通过天线波束在方位向扫描,在保持ScanSAR宽测绘带优点的同时,解决了扇贝效应(scalloping)问题。针对这种工作模式要求天线在方位向和距离向都进行扫描的特点,推导了方位分辨率与扫描周期的具体关系,进而分析了系统参数的约束关系,提出了适于工程设计的系统参数设计方法。最后,用TerraSAR-X的参数进行了一组设计,以该设计结果为输入参数,运用SBRAS(SpaceBorne Radar Advance Simulator)进行了信号仿真,仿真结果验证了方法的有效性。
TOPSAR（Terrain Observation by Progressive Scans） is a novel spaceborne SAR mode for wide-swath observation,which solves the scalloping problem of ScanSAR though steering antenna beam in azimuth direction.The relationship between azimuth resolution and cycle time of TOPSAR was derived.Furthermore,the constraint of parameters was analyzed and the flow of engineering parameter design was presented.Finally,a TerraSAR-X like sample was provided and a simulation was conducted with the design result in SBRAS（SpaceBorne Radar Advance Simulator）.The results show the effectiveness of the design.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2012年第5期68-72,共5页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(61101187)
