空间目标动态电磁测量数据仿真方法研究

空间目标由于高速运动和微运动在电磁波上的调制效应,其动态实测的雷达散射截面(radar cross section,RCS)和高分辨一维距离像(high resolution range profile,HRRP)与暗室测量或电磁计算数据存在较大的差异。针对空间目标外场动态测量数据难以获取的难题,提出了用目标静态数据生成动态RCS和一维距离像数据的方法。该方法首先确定目标的轨道和雷达的布站坐标及工作模式,而后计算目标在雷达观测视线(line of sight,LOS)方向上的姿态和运动参数,最后根据空间目标高速运动、自旋、进动等在电磁波上调制的数学模型生成动态测量数据。给出了该方法的具体步骤,仿真实验证明了方法的有效性。

Study on dynamic electromagnetic data simulation of space targets

The radar cross section(RCS) and high resolution range profile(HRRP) of space targets measured in a chamber or calculated by electromagnetic software differ greatly from the actual measured data because the radar echoes are modulated by the high-speed and micro-motion of space targets.Due to the actual measuring data of space targets being difficult to be acquired,a novel method which generates dynamic RCS and HRRP based on static data is presented.In the method,the orbit of targets and the radar coordinates and parameters are put to calculate attitude and dynamic parameters of targets in line of sight(LOS).And then the dynamic data are generated according to the electromagnetic modulation model of the movement of targets including motion at high speed,spin,precession on electromagnetic wave.The realizable steps are given.The experiments verify the validity of this method.