摘要
以星载寄生式SAR系统成像信号模型为基础,给出了该系统的干涉模型,分析了其特点和限制条件,提出了距离向有效基线和方位向有效基线的新概念。以Cartwheel和Pendulum两种编队构形为实例,分析了寄生式SAR系统有效基线的限制和相对高程测量的性能,结果表明:编队形式固有的基线耦合给性能造成不利影响,在这方面Pendulum编队优于Cartwheel编队构形;距离向和方位向预滤波处理可提高图像对的相关性,但并不能完全去除几何去相关对性能的影响。
<Abstrcat>Based on the radar image model of spaceborne parasitic SAR system, interferometric model of this new system is proposed; new characters and limits are analyzed in detail. The concepts of the range and azimuth effective baseline are given at the same time. The limits of effective baselines and performance of INSAR relative height measurement of Cartwheel and Pendulum configuration are analyzed. The influence of interrelation of the range and azimuth baseline and pre-filtering technology are pointed out.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2005年第3期72-76,共5页
Journal of National University of Defense Technology
