朗伯三锥体的后向LRCS

Backward LRCS of Lambertian Triconic

朗伯三锥体的LRCS计算对激光雷达识别目标的研究具有一定的意义。目标的激光雷达横截面(LRCS)的计算是为利用激光雷达方程计算目标的平面波激光的散射功率所需要的。本文给出朗伯三锥体LRCS的统一积分法和差异积分法的两种计算方法,其中差异积分法克服统一积分法中存在的舍掉误差,这个误差是在计算时存在分母为0情况,舍掉的误差。三椎体不是凸体,利用射线跟踪设计遮挡剔除算法,实现朗伯三椎体后向LRCS的精确计算。分析观测方向的方位角、观测方向的天顶角和目标尺寸对LRCS的影响。

LRCS calculation of Lambertian tri-cone has a certain significance for the study of laser lidar target recognition.The calculation of lidar cross section(LRCS)is required to calculate the scattering power of the target's plane wave laser by using the Lidar equation.In this paper,two calculation methods of unified integration and difference integration for the LRCS of lambertian triconic are given.The difference integration method overcomes the rounding error in the unified integration method.This error is the rounding error when the denominator is 0.Tricone is not a convex body.The occlusion elimination algorithm is designed by ray tracing to realize the accurate calculation of the backward LRCS of lambertian tricone.The effects of azimuth angle of observation direction,zenith angle of observation direction and target size on LRCS are analyzed.