利用红外波段的大气消光特性测量大气水汽总量  

Measurement of total precipitable water in atmosphere with atmospheric extinction in infrared waveband

作　　者：王术军[1] 张保洲[1] 李子英[1] 

机构地区：[1]北京师范大学天文系北京市重点应用光学实验室,北京100875

出　　处：《应用光学》2007年第4期431-434,共4页Journal of Applied Optics

摘　　要：大气总水汽量是天文观测和气象科学领域最为重要的参量之一。介绍一种测量大气水汽总量的新方法和仪器。该仪器采用电荷耦合器件(CCD)制作的光谱仪来测量日光或月光通过大气后在750 nm^1 000 nm近红外波段的光谱,进而计算出935 nm水汽吸收带相对于889 nm背景的剩余强度,再根据R=0.59W函数模式求出大气水汽含量。最后讨论了水汽测量仪的定标方法、性能及其优缺点,给出了测试结果。测试结果表明:该测量仪器测量水汽方法直观,性能稳定。The total precipitable water in atmosphere is astronomical observation and meteorology. A new one of the most important parameters in instrument for measuring the total precipitable water in the atmosphere is introduced. The near infrared spectra of sunlight or moonlight passing through atmosphere were measured by a CCD spectrometer in the instrument, then the central residual intensity of the water vapor absorption at 935 nm waveband was calculated and the total precipitable water in the atmosphere was derived by R= 0. 59 √w model. The calibration method, performance, advantages and disadvantages of the water vapor measurement instrument were discussed and measurement results were given. The measurement results indicate that this method is straightforward and its performance is stable.

关 键 词：水汽总量 剩余强度 大气消光特性 光谱仪 

分 类 号：TN206[电子电信—物理电子学] TH744.134[机械工程—光学工程]