空间目标激光雷达散射波实验室模拟技术

散射特性是目标光学重要特征之一,是激光雷达对目标探测与识别的基础,为获取散射波特性数值,提出空间目标激光雷达散射波实验室模拟技术.首先利用积分方程将散射场分成切面近似场与补偿场,分别计算散射场与散射功率;其次根据双频互相关函数推导空间目标激光雷达方程,获取单位面积的激光雷达截面与双向分布函数之间关系,确定光滑、中等粗糙...

Laboratory simulation technology of lidar scattering wave of space target

Scattering characteristic is one of the essential characteristics of target optics,which is the basis of lidar detection and recognition of the target. In order to obtain the scattering wave characteristic value,the laboratory simulation technology of lidar scattering wave of space target is proposed. Firstly,the scattering field is divided into section approximation field and compensation field using the integral equation,and the scattering field and scattering power are calculated respectively. Secondly,the lidar equation of space target is derived according to the dual-frequency crosscorrelation function. The relationship between the lidar cross-section per unit area and the bidirectional distribution function is obtained to determine the smooth,medium rough and rough three kinds of surface physical statistics. Finally,the Stokes parameter is calculated using the rotating polarizer method to measure the scattering wave parameters,the surface roughness and the incident wavelength change frequently. When the target’s surface roughness is larger,the scattering coefficient is smaller;when the incident wave is more extended,the scattering coefficient is higher. The laboratory simulation of space target lidar scattering wave is realized,which provides the theory for high-performance radar target recognition basis.