星载SAR全球波位参数自适应计算方法  

An Adaptive Computing Method of Global Beam Position Parameters of Space-borne SAR

作　　者：徐辉[1] 辛培泉[1] 刘光炎[1] 林幼权[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2011年第7期31-35,39,共6页Modern Radar

摘　　要：星载SAR运行速度快,轨道高度和地面海拔起伏大,导致针对固定观测位置设计的波位参数无法适用于全球。文中首先分析了星地几何约束、系统性能约束、卫星轨道高度和地面高程变化等对星载SAR波位参数的约束,然后提出一种星载SAR全球波位参数的自适应计算方法。该方法根据观测任务要求自动确定成像时段,并计算成像时段内的星地几何数据;然后自适应计算回避星地几何约束和满足系统性能要求的全球波位参数。The parameter of beam position for a fixed observing location is not fit for global observing because of high speed of space-borne SAR,variation of orbit height and volatility of earth surface.Several factors which affect parameters of beam position are evaluated,such as the geometric constraint between satellite and earth,the requirements of system,variation of orbit height and volatility of earth surface.A new Method which can adaptively compute beam position parameters of space-borne SAR is introduced in this paper,and it is fit for global observing location.The method can adaptively determine imaging time and geometric data in the imaging,and then the parameters of beam position are obtained.The requirements of system and geometry restraint between satellite and earth are considered in the computing process.

关 键 词：星载SAR 波位 自适应计算方法 

分 类 号：TN958[电子电信—信号与信息处理]