Refractive index of humid air in the infrared: model fits

被引:97
|
作者
Mathar, Richard J. [1 ]
机构
[1] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
来源
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 2007年 / 9卷 / 05期
关键词
refractive index; infrared; water vapour; humid air; phase velocity;
D O I
10.1088/1464-4258/9/5/008
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The theory of summation of electromagnetic line transitions is summarized in terms of the Taylor expansion of the refractive index of humid air as a function of the basic independent parameters ( temperature, pressure, humidity, wavelength) in five separate infrared regions from the H to the Q band at a fixed percentage of carbon dioxide. These are least-squares fits to raw, highly resolved spectra for a set of temperatures from 10 to 25 degrees C, a set of pressures from 500 to 1023 hPa and a set of relative humidities from 5 to 60%. These choices reflect the prospective application to characterize ambient air at mountain altitudes of astronomical telescopes.
引用
收藏
页码:470 / 476
页数:7
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