侧向散射激光雷达的蒙特卡罗仿真与实验研究  

Monte Carlo Simulation and Experimental Study of Side-Scattered Lidar Echo Signals

作　　者：冯冰 胡淼[1,2] 李鹏 韩宁 金涛[1] 欧军 周雪芳 杨国伟 卢旸[1] 毕美华[1] FENG Bing;HU Miao;LI Peng;HAN Ning;JIN Tao;OU Jun;ZHOU Xue-fang;YANG Guo-wei;LU Yang;BI Mei-hua(College of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China;State Key Laboratory of NBC Protection for Civilian,Beijing 102205,China;Research Institute of Chemical Defense,Beijing 102205,China)

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018 [2]国民核生化灾害防护国家重点实验室,北京102205 [3]防化研究院,北京102205

出　　处：《光子学报》2018年第10期148-155,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61705055);国民核生化灾害防护国家重点实验室开放基金(No.SKLNBC2015G03)资助~~

摘　　要：利用半解析蒙特卡罗方法建立了侧向散射激光雷达的理论模型.根据理论模型研究了多次散射条件下,大气气溶胶对激光雷达光束的侧向散射机制.通过对理论模型的仿真,得到了侧向散射光子的空间分布规律,获得了侧向散射光强和散射系数曲线.比对了能见度分别为5.7km,8.0km,10.2km的实验大气条件下仿真与实验获取的散射系数曲线,发现当模型中大气平均散射因子和非对称因子(μs,g)分别为(0.7,0.65),(0.45,0.45)和(0.2,0.35)时,仿真与实验的拟合优度优于95%.A theoretical model of the side-scattering lidar is established by semi-analytical Monte Carlo method.In the model,the side-scattering mechanism of the laser beam on the atmospheric aerosol is studied under multiple-scattering conditions.Through the theoretical simulation of the model,the spatial distribution of the side-scattered photons as well as the side-scattering intensity and the scattering coefficient curves are obtained.Comparing the scattering coefficient curves obtained by experiments and simulations under visibility conditions of 5.7 km,8 km and 10.2 km,it is found that with the average scattering factor and the asymmetric factor(μs,g)at(0.7,0.65),(0.45,0.45)and(0.2,0.35),the fit goodness is better than 95%.

关 键 词：蒙特卡罗模拟 平均散射因子 非对称因子 大气光学 多次散射 

分 类 号：TN012[电子电信—物理电子学]