探测光波长漂移对能见度测量的影响  

Influence of detection wavelength drift on visibility measurement

作　　者：肖韶荣[1] 尚国庆[2] 周佳[2] 徐猛[2] 吴群勇[2] 

机构地区：[1]南京信息工程大学物理与光电工程学院,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《应用光学》2014年第5期853-857,共5页Journal of Applied Optics

基　　金：科技部公益性(气象)行业专项(GYHY201203067);江苏省科技支撑计划(BE2010733)

摘　　要：为了研究探测光波长的漂移对能见度测量的影响。从Koschmieder经验公式的定义出发,根据实验测得400nm^1 100nm波段的气溶胶透过率,分析研究探测光波长漂移对能见度测量结果的影响。结果表明,能见度测量的相对误差与探测光波长和波长的漂移范围以及气溶胶消光特性有关,能见度测量的相对误差随着探测光的波长漂移范围线性增大,随着波长漂移范围的增大,各个波长的能见度测量相对误差线性增大的速率不同,对于相同的波长漂移范围,使用不同的探测光波长产生的能见度测量相对误差不同。对于某一大气环境,使用特定的波长而且中心波长稳定的光作为探测光可以明显减小由于探测光波长漂移引起的能见度测量相对误差。In order to study the influence of detection wavelength drift on visibility measurement,based on the definition of Koschmieder empirical formula and the aerosol transmittance of400nm^1 100 nm waveband measured in experiment,the influence of detection wavelength drift on visibility measurement was analyzed.The results show that the relative error of visibility measurement is related to detection wavelength,range of detection wavelength drift and aerosol extinction characteristics.The relative error of visibility measurement increases with the range of detection wavelength drift in linearity.With the increasing range of detection wavelength drift,the linearly increasing rate of the relative error in visibility measurement at each wavelength is different.Under the same range of detection wavelength drift,the visibility measurement error is different by using the different detection wavelengths.In a certain atmospheric environment,the relative error of visibility measurement caused by detection wavelength drift can be reduced obviously by using the light of a specific center wavelength with small drift as the detecting light.

关 键 词：能见度 探测光波长 测量误差 Koschmieder经验公式 

分 类 号：TN12[电子电信—物理电子学] P427.2[天文地球—大气科学及气象学]