基于高斯光束特性的Mie散射大气激光雷达回波近场信号校正研究  

The correction of short-range Mie scattering laser lidar returns based on the Gaussian character of laser beam

作　　者：王治华[1] 贺应红[2] 左浩毅[1] 郑玉臣[3] 杨经国[1] 

机构地区：[1]四川大学物理系,成都610064 [2]中国科学院西安光学精密机械研究所,西安710068 [3]香港城市大学物理及材料科学系,香港四川大学物理系成都610064

出　　处：《物理学报》2006年第6期3188-3192,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60078020;60478044)资助的课题~~

摘　　要：介绍一种基于高斯光束传输特性对Mie散射激光雷达回波信号校正的新方法.首先根据发射激光束的高斯光束特性,对大气激光雷达回波信号作高斯修正,然后在大气近似均匀假定下,对近场区经高斯修正的回波信号距离校正函数进行二次曲线拟合,实现对交叠面积影响的修正,实际计算表明,用此方法对Mie散射激光雷达回波近场信号进行处理,可获得与实际更为接近的反演结果.A new method for correcting Mie scattering laser lidar short-range returns by virtue of Gaussian emission was described. Firstly, basing on the Gaussian character of laser beam, the lidar returns were corrected. Secondly, on the assumption of an almost homogenous atmosphere, the corrected logarithmic range-adjusted power curve S（r） was fitted with conic section, then the corresponding influences of overlapping area were corrected. Some examples show that the corrected results are much closer to the real atmospheric conditions.

关 键 词：大气激光雷达 高斯光束 回波近场信号修正 大气消光系数 

分 类 号：TN958.98[电子电信—信号与信息处理]