差分吸收激光雷达几何因子实验确定方法  

Experimental determination of lidar geometric factor in differential absorption lidar

作　　者：范广强[1] 刘建国[1] 刘文清[1] 陆亦怀[1] 张天舒[1] 赵雪松[1] 董云升[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥230031

出　　处：《量子电子学报》2013年第1期93-97,共5页Chinese Journal of Quantum Electronics

基　　金：国家863计划(2009AA06A311);国家重大科学仪器设备开发专项(2011YQ120024)

摘　　要：差分吸收激光雷达发射光束与接收视场的重叠区域用几何因子函数来描述,几何因子是差分吸收激光雷达的重要参数。提出了一种实验方法,实验使用米散射激光雷达和差分吸收激光雷达同时测量信号,通过对比分析两台激光雷达采集信号计算得到的气溶胶散射比廓线,获得差分吸收激光雷达的几何因子。该方法的优点在于不需要预先得到精确度高的激光雷达参数,比如望远镜直径,光束发散角,望远镜接收视场角等。该方法的应用有利于减少近地面差分吸收激光雷达测量臭氧廓线的误差,提高差分吸收激光雷达的探测性能,有助于研究近地面层的臭氧时空分布特征。The lidar geometric factor describes the overlap between the laser beam and the receiver of field of view in differential absorption lidar. It is an important system parameter in differential absorption lidar An experimental determination method of the lidar geometric factor is presented based on the comparison of aerosol scattering ratio profile derived from the signals measured by differential absorption lidar and Mie lidar simultaneously. The approach provides a means to determine the lidar geometric factor without an explicit knowledge of all lidar system parameter, such as the telescope diameter, laser beam divergence telescope of field of view et al. The application of the proposed method can reduce the ozone measurement error of differential absorption liar and improve the potential of differential absorption lidar to investigate the spatial and temporal distribution characteristics of ozone

关 键 词：差分吸收激光雷达 米散射激光雷达 几何因子 气溶胶修正 对流层臭氧 

分 类 号：TN958.98[电子电信—信号与信息处理]