基于辐射传输的M′波段大气透过率实测和误差分析  

Measurement and error analysis of the atmospheric transmissivity in M′ band based on radiative transfer

作　　者：陈双远 王飞翔 许方宇[1] 郭杰[3] 肖建国 贾钰超 徐稚[1] 赵志军 王远方舟 Chen Shuangyuan;Wang Feixiang;Xu Fangyu;Guo Jie;Xiao Jianguo;Jia Yuchao;Xu Zhi;Zhao Zhijun;Wang Yuanfangzhou(Astronomical Opto-electronic Laboratory,Yunnan Astronomical Observatories,Chinese Academy of Sciences,Kunming 650216,China;Operation and Development Center of FAST Engineering,National Astronomical Observatories,Chinese Academy of Sciences,Pingtang 558300,China;Yunnan Key Laboratory of Optic-electronic Information Technology,Yunnan Normal University,Kunming 650500,China;Yunnan KIRO-CH Photonics Co.Ltd,Kunming 650217,China;School of Physics,Henan Normal University,Xinxiang 453007,China)

机构地区：[1]中国科学院云南天文台天文光电实验室,云南昆明650216 [2]中国科学院国家天文台FAST运行和发展中心,贵州平塘558300 [3]云南师范大学云南省光电信息技术重点实验室,云南昆明650500 [4]云南北方驰宏光电有限公司,云南昆明650217 [5]河南师范大学物理学院,河南新乡453007

出　　处：《红外与激光工程》2019年第12期47-52,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(11873091,11803089);云南省应用基础研究计划青年项目(2017FD069)

摘　　要：采用自制的M′波段(4.605~4.755μm)红外辐射测量系统对阿里观测站、德令哈观测基地和怀柔观测基地的大气辐射进行实地测量,并对结果进行拟合和误差分析。首先,基于黑体定标结果和辐射传输方程,得到输出有效读数与平均大气透过率和天顶角的关系公式;在三个站点对不同天顶角下的大气红外辐射进行扫描测量,利用上述公式,拟合出M′波段平均大气透过率。结果表明,三地透过率的加权平均值分别为0.805、0.758、0.650,透过率随时间的起伏分别为0.081、0.250、0.073,高海拔的阿里观测站透过率最高。用MODTRAN软件模拟的平均透过率分别为0.851、0.805、0.615,与实测结果接近;误差分析表明:有效读数越大,传递误差越小,此方法的理论误差优于10%。文中提供了一种不依赖气象数据,实时获得大气透过率的方法。The atmospheric infrared radiance was measured at Ali,Delingha and Huairou observing station using a self-made measurement system in the infrared M′(4.605-4.755μm)band.Based on the blackbody calibration and the radiative transfer equation,a simplified relation between the effective output value,the average zenith atmospheric transmissivity and the zenith angles can be obtained.Atmospheric infrared radiation of different zenith angles at three Astronomical Station were measured and scanned,and the above formula was used to fit the average atmospheric transmissivity of the M′band.The measurement results show that the weighted average values of the atmospheric transmissivity in the three places are 0.805,0.758 and 0.650 respectively,with the fluctuations of 0.081,0.250,and 0.073 respectively.The average transmissivity simulated by MODTRAN software was respectively 0.851,0.805,0.615,which was close to the results from the measurement.The error analysis shows that the propagation error decreases with the increasing effective output value.The theoretical error of indirect measurement method was analyzed to be less than 10%.This paper provided a on-site and real-time measuring method of the atmospheric infrared transmissivity independent of meteorological data.

关 键 词：大气透过率 大气辐射测量 红外系统 误差分析 

分 类 号：P414.5[天文地球—大气科学及气象学] TH751[机械工程—仪器科学与技术]