分布式小卫星SAR回波信号仿真  

Simulation of Echo Signal in Distributed Satellite-borne SAR

作　　者：武昕伟[1] 张绪锦[1] 张长耀[1] 

机构地区：[1]中国电子科技集团公司第38研究所成像中心

出　　处：《系统仿真学报》2007年第13期3056-3059,3100,共5页Journal of System Simulation

摘　　要：基于分布式卫星的空间构形及相对运动,在地心赤道坐标系内分析了卫星平台与地面目标之间的瞬时距离、相对速度及加速度变化规律,给出一种基于编队构形的分布式小卫星SAR目标回波信号产生的方法,并用距离—多普勒算法进行成像。这为进一步研究基于分布式卫星SAR的动目标检测性能提供了数据基础,有助于编队卫星SAR系统参数设计和选择。Based on spatial configuration and relative movement in the distributed satellites, a set of analytical formulas, which calculate instantaneous ranges and relative velocities and accelerations between satellite-borne SAR and targets on the earth, were derived in the Earth-Centered lnertial reference frame. A simulation method of satellite-borne SAR echo signal was proposed based on formation scheme in the distributed satellites, The simulated image was acquired by Range-Doppler imaging algorithm. The echo signal of scenes on the earth with overlaid moving point targets was simulated, in order to study new moving target detection theories for distributed satellite-borne SAR. At the same time, the work contributed to parameters design and performance analysis of the system.

关 键 词：分布式卫星 编队构形 轨道根数 波束投影点 合成孔径雷达 回波仿真 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计] TN959.73[电子电信—信号与信息处理]