有限距离大气透过率实验研究  

Experimental Study of Atmospheric Transmittance in Finite Distance

作　　者：孙国栋 秦来安 侯再红 

机构地区：[1]中国科学院安徽光学精密机械研究所大气成分与光学重点实验室,安徽合肥230031 [2]中国科学技术大学研究生院,安徽合肥230026

出　　处：《中国激光》2017年第12期168-176,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(41405014)

摘　　要：将成像激光雷达这一新型主动大气探测手段运用于水平大气透过率测量研究。采用矩阵图像错位相加法提高信噪比。获取随距离变化的信号之后,通过Klett积分结合斜率法的反演方式获得1km以内水平传输路径上的消光系数分布,对消光系数进行路径积分,计算出水平大气透过率。将反演结果与对比实验中直接测量的大气透过率进行对比分析,发现不同天气情况下两者的相关性系数在0.7以上,相对误差在20%以内。该成像激光雷达设备可进行有限距离的水平大气透过率探测研究。A new active atmospheric detection means of the imaging lidar is used in the horizontal atmospheric transmittance detection.A matrix image dislocation addition method is proposed to improve the signal to noise ratio.When the signal which is changing with the distance is obtained,an inversion method combined with the slope method and Klett integration is adopted to retrieve the extinction coefficient distribution in 1 km horizontal transmission path.The horizontal atmospheric transmittance can be achieved based on the path integral of extinction coefficient.By comparing the inversion results of comparing experiments with the atmospheric transmittance obtained in direct measurements,we find that the correlation coefficient is over 0.7 and the relative error is within20%.The imaging lidar can be an instrument for the study on detecting the horizontal atmospheric transmittance in the finite range.

关 键 词：大气光学 成像激光雷达 大气透过率 消光系数 有限距离 

分 类 号：TN0[电子电信—物理电子学]