多次散射的卷云激光雷达比反演方法研究  

The study of the lidar ratio retrieval method with multiple scattering cirrus cloud

作　　者：熊兴隆[1] 李猛[1] 蒋立辉[1] 冯帅[1] 庄子波[1] 

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300

出　　处：《光电子．激光》2014年第6期1158-1164,共7页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展"973"计划(2010CB731801);国家自然科学基金(60879016)资助项目

摘　　要：提出了一种Mie散射激光雷达在考虑多次散射影响时求解卷云激光雷达比的新方法。首先,根据多次散射激光雷达方程,构建关于气溶胶消光系数边界值和卷云有效激光雷达比的非线性方程组;其次,采用非线性粒子群算法求解方程组,同时得到气溶胶消光系数边界值和卷云的有效激光雷达比;然后,使用Platt的多次散射因子方程,结合邱金桓参数化的多次散射对一次散射比,计算多次散射因子,进而求得卷云的激光雷达比。使用Mie散射激光雷达真实回波信号进行了实验验证,结果表明,方法收敛速度快,精度较高,具有很好的应用价值。A novel method of Mie scattering lidar to determine the lidar ratio in cirrus clouds with the multiple scattering is proposed.Firstly,according to the multiple scattering lidar equations,the nonlinear equations with cirrus lidar ratio and cirrus top extinction coefficient as variables are constructed.Secondly,by using the particle swarm optimization algorithm to solve the equations,the extinction coefficient of the cirrus′s top and the lidar ratio of cirrus clouds are acquired.Then,through the PLATT′s multiple scattering equation and the ratio of multiple scattering to single scattering given by Qiu Jinhuan,the lidar ratio is obtained.The experiment is carried out based on the proposed method,using the real return signals of the ground-based lidar.It′s turned out that the prosed technique has the advantages of high accuracy and the fast convergence of iteration.

关 键 词：激光雷达比 Mie散射激光雷达 多次散射 卷云 

分 类 号：TN958.98[电子电信—信号与信息处理]