空间目标激光雷达散射波实验室模拟技术  

Laboratory simulation technology of lidar scattering wave of space target

作　　者：赵若曼[1] 陈少捷 张川[1] ZHAO Ruoman;CHEN Shaojie;ZHANG Chuan(College of Science&Technology Ningbo University,NingBo Zhejiang 315212,China)

机构地区：[1]宁波大学科学技术学院,浙江宁波315212

出　　处：《激光杂志》2021年第3期91-95,共5页Laser Journal

基　　金：浙江省自然科学基金(No.LY14F010004);浙江省高校实验室工作研究项目(No.Y201029);宁波市教育科学规划课题(No.YGH004)。

摘　　要：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、粗糙三种表面物理统计量;最后对斯托克斯参量定义,得出自然光状态下的归一化形式,并利用旋转偏振片法测量散射波参数,表面粗糙度与入射波长不断变化,当目标表面粗糙度越大,散射系数越小;入射波越长,散射系数越高时,实现空间目标激光雷达散射波实验室模拟,为高性能雷达目标识别提供理论依据。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.

关 键 词：空间目标 激光雷达 散射波特性 实验室模拟 表面粗糙度 

分 类 号：TN249[电子电信—物理电子学]