一套测量对流层臭氧的差分吸收激光雷达系统  

A Differential Absorption Lidar System for Tropospheric Ozone Monitoring

作　　者：范广强[1] 刘建国[1] 陈臻懿[1] 刘文清[1] 陆亦怀[1] 张天舒[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,安徽合肥230031

出　　处：《中国激光》2012年第11期198-204,共7页Chinese Journal of Lasers

基　　金：国家863计划(2009AA06A311);国家重大科学仪器设备开发专项(2011YQ120024);合肥物质研究院青年人才基金(Y03RC11122)资助课题

摘　　要：差分吸收激光雷达是探测对流层臭氧分布的一种先进工具。研制了一套车载差分激光雷达系统,系统基于Nd:YAG四倍频激光和拉曼频移技术产生紫外差分光源,并采用卡塞格林(Cassegrain)型望远镜,利用光栅光谱仪分离四波长的回波信号,使用光子计数和模拟采集相融合的方式采集数据。讨论分析了系统的测量精度并与臭氧探空仪进行了对比验证实验。实验结果表明,两台仪器测量的对流层臭氧具有很好的一致性,证实了车载差分吸收激光雷达系统及臭氧浓度分析软件的可靠性。The differential absorption lidar is an advanced instrument for monitoring atmospheric ozone concentration profile. A new vehicle differential absorption lidar is developed. The lidar system emits four wavelengths ultraviolet laser based on a frequency quadrupled Nd： YAG laser and Raman shifting technique. A Cassegrain telescope is used and the grating spectrometer is used to separate the backscatter signals of the four emited wavelengths. The data is collected by photon counting and analog acquisition integration mode. The accuracy of measurement system is discussed and analyzed. The lidar system and ozonesonde under took experiments at the same time. Experimental results show that tropospheric ozone profiles derived from lidar and ozonesonde are in good agreement, suggesting that the vehicle differential absorption lidar system and ozone concentration analysis software are reliable.

关 键 词：遥感 差分吸收激光雷达 对流层臭氧 拉曼管 统计误差 对比 

分 类 号：TN958.98[电子电信—信号与信息处理]