报道了一种使用最小二乘法拟合大气激光雷达回波信号,计算消光系数边界值的算法.对于无云层天气条件,利用最小二乘法对回波信号全程拟合获得大气消光系数边界值,在有云层天气下,先将激光雷达信号在大气中的传输光路分解为云层区和非云层区,忽略回波信号中的云层信息,并假设在非云层区大气近似均匀,利用最小二乘法拟合获得大气消光系数边界值.最后利用消光系数边界值求解激光雷达方程,反演获得大气消光系数.?导始扑阒っ?用此算法可获得与实际更为接近的大气消光系数反演结果.

A new type of method for estimating extinction efficient boundary values with least square fitting for inversion of slant angle lidar measurement is reported. In cloudless weather, the boundary values of extinction is calculated by fitting lidar return signal. For cloudy weather, firstly, the measured region is divided into cloudy and cloudless section. Then it is assumed that the cloudless region is homogenous circumstance. The boundary values of extinction is calculated by fitting lidar return signal except the cloudy region. Finally, the atmospheric extinction coefficients are inversed with Klett's inversion algorithm and the boundary values. The simulation results are close to the real atmospheric conditions.