拉曼雷达测量大气二氧化碳浓度回波信号误差分析  

Scattering Signal Error Analysis of Atmospheric Carbon Dioxide Detection by Raman Lidar

作　　者：赵日峰[1] 魏冬梅[1] 潘杰[1] 肖斌[1] 张童心[1] 

机构地区：[1]山东师范大学物理与电子科学学院,山东济南250014

出　　处：《北京理工大学学报》2014年第6期613-616,共4页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金青年资助项目(41105008);山东省科技攻关计划课题(2009GG10004033)

摘　　要：拉曼雷达探测二氧化碳的后向散射回波信号十分微弱,有效分析信号的误差非常重要.从理论上分析了拉曼激光雷达探测二氧化碳气体的回波信号误差的计算方法,推导计算了二氧化碳浓度信号的混合比,得到了影响信号误差的3种因素,并对各因素进行了理论计算,从实验上对信号误差进行了数据验证.将理论值与实验数据进行对比,确定信号采集过程中造成的数据误差小于10%,并随距离的增加而增加;大气透过率相对函数的误差约为2%;标定常数的误差小于5%.Because the Raman lidar scattering signal of detecting the atmospheric carbon dioxide is very weak,it is important to analyze the signal errors effectively.The method was described from the theoretical analysis to calculate the errors of Raman lidar scattering signal.Moreover,the mixing ratio of the carbon dioxide concentration signal was deduced.The three factors that influence the Raman signals errors were obtained and each factor was calculated theoretically.The signal errors were verified by the experiment data.Comparing the theoretically results with the experiment data,it is shows that the data error caused by the signal acquisition process is less than 10%and increases with the increasing distance;the atmospheric transmittance relative function error is less than 2%and the calibration constant error is less than 5%.

关 键 词：拉曼雷达 二氧化碳 误差分析 

分 类 号：TN958.98[电子电信—信号与信息处理]