中文摘要：

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。

英文摘要：

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.