532nm和355nm瑞利激光雷达观测中层大气的数据对比分析  

Comparative analysis of the middle atmospheric parameters observed by 532 nm and 355 nm Rayleigh Lidar

作　　者：邓潘[1,2,3] 张天舒[1] 刘建国[1] 刘洋[1,2] 董云升[1] 范广强[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]中国科学技术大学,安徽合肥230036 [3]电子工程学院脉冲功率激光技术国家重点实验室,安徽合肥230037

出　　处：《红外与激光工程》2016年第A02期19-25,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(41205119);国家863计划(2014AA06A512)

摘　　要：分别采用532 nm和355 nm瑞利散射激光雷达对合肥地区25~40 km高度大气密度、压力和温度垂直分布进行了探测。532 nm瑞利激光雷达系统采用532 nm波长Nd：YAG激光器及400 mm口径卡塞格林型望远镜。355 nm瑞利激光雷达系统在532 nm瑞利激光雷达系统上进行改进,采用355 nm波长Nd：YAG激光器及4只400 mm口径卡塞格林型望远镜。通过实验对比得出,355 nm激光雷达系统信噪比高于532 nm激光雷达系统约6倍。355 nm激光雷达系统大气密度及压力探测值与当日气球探空数据比值波动小于532 nm激光雷达系统。355 nm激光雷达系统探测大气温度与当日气球探空数据偏差均值约为-2.14 K,最大温度偏差约为6 K,532 nm激光雷达系统探测大气温度与当日气球探空数据偏差均值约为-6.98 K,最大温度偏差约为9 K。两台激光雷达对比实验说明,改进的355 nm激光雷达系统对中层大气密度、压力和温度探测精度要高于532 nm激光雷达系统,改进的355 nm激光雷达系统探测性能优于532 nm激光雷达系统。The middle atmospheric density, pressure and temperature structure was measured by 532 nm and 355 nm Rayleigh Scattering Lidar between the altitude 25 km and 40 km at Hefei（ 31. 90 ° N;117.170° E）, respectively. 532 nm Rayleigh Scattering Lidar system adopted Nd ：YAG laser of 532 nm and 400 mm Cassegrain telescope. 355 nm Rayleigh Scattering Lidar system which was improved on the basis of 532 nm Rayleigh Scattering Lidar system, employed Nd：YAG laser of 355 nm and four Cassegrain telescopes of 400 mm. According to experimental comparison, it could obtain that the SNR of355 nm Rayleigh Scattering Lidar is more than 532 nm Rayleigh Scattering Lidar of about 6 times. The fluctuation of the density ratio and pressure ratio of 355 nm Rayleigh Scattering Lidar to Sounding Balloon are less than the fluctuation of 532 nm Rayleigh Scattering Lidar. The temperature biases between 355 nm Rayleigh Scattering Lidar and the sounding balloon of that day are about-2.14 K, and the maximum deviation is about 6 K. And the temperature biases between 532 nm Rayleigh Scattering Lidar and the sounding balloon of that day are about-6.98 K, and the maximum deviation is about 9 K.The results of comparative test for 355 nm Rayleigh Scattering Lidar and 532 nm Rayleigh Scattering Lidar have shown that the detection precision of 355 nm Rayleigh Scattering Lidar was higher than 532 nm Rayleigh Scattering Lidar, and the performance of 532 nm Rayleigh Lidar is better than 532 nm Rayleigh Lidar.

关 键 词：瑞利散射 激光雷达 大气密度 大气压力 大气温度 

分 类 号：P413.2[天文地球—大气科学及气象学]