空间微动目标动态全极化回波仿真技术研究

从空间微动目标的运动特性和全极化散射特性两方面出发,研究了进动目标动态全极化回波仿真技术。分析了自由段飞行过程中目标姿态角的变化规律,通过进动坐标系建立了微动参数到目标姿态角的映射关系,修正了直接将偏航、俯仰、横滚等三个欧拉角应用于进动目标姿态角计算的方法。建立了目标测量极化到雷达发射极化的变换关系,指出全极化雷达各个极化通道回波的仿真,均需要目标全极化测量数据的支撑。典型参数下的仿真结果表明,本文提出的方法能够逼真反映空间微动目标的全极化特性。

Research on Simulation of Dynamic Full-polarizationRadar Echo for Spatial Targets

Based on motion characteristic and full-polarization scattering characteristic of spatial targets,simulation of full-polarization radar echo for precession targets was researched.The law of attitude angle changed with time was analyzed.And the mapping between attitude angle and micro-motion parameters was proposed through a particular precession coordinate.The method of describing micro-motion parameters using Euler angle such as yaw,pitch and roll was corrected.The transformation relation between transmit polarization and measurement polarization was established.And the conclusion is that full-polarization characteristic of targets is indispensable to radar echo simulation of every polarization channel.At the same time the simulation results in the typical parameters are shown in figures,which validate the means of simulating the spatial targets.