| Profile and Character of Atmospheric Structure Constant of Refractive Index Cn2 |
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| 作者姓名： | SUN Gang WENG Ning-Quan XIAO Li-Ming WU Yi |
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| 基金项目： | supported by the National High Technology Research and Development Program of China (GrantNo. 2011AA8061007) |
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| 摘 要： | Random fluctuations of turbulence bring random fluctuations of the refractive index, making the atmosphere a random fluctuation medium that destroys the coherence of light-waves. Research in atmospheric turbulence is actually the investigation of the atmospheric refractive index. The atmospheric structure constant of refractive index, Cn2, is an important parameter denoting atmospheric turbulence. In this paper, Cn2 is measured during the day and at night and in all four seasons using a high sensitivity micro-thermal meter QHTP-2. The vertical profile of Cn2 in Hefei (0–30 km) is investigated by the analysis of experimental data. The average profile of Cn2 in Hefei exhibits conspicuous day and night differences with increased altitude. The distribution of log(Cn2) is nearly normal and has conspicuous seasonal differences.
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| 关 键 词： | applied optics atmospheric turbulence atmospheric structure constant of refractive index variance profile |
Profile and Character of Atmospheric Structure Constant of Refractive Index Cn2 |
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| SUN Gang,WENG Ning-Quan,XIAO Li-Ming,WU Yi.Profile and Character of Atmospheric Structure Constant of Refractive Index Cn2[J].Atmospheric and Oceanic Science Letters,2012,5(3):270-272. |
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| Authors: | SUN Gang WENG Ning-Quan XIAO Li-Ming and WU Yi |
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| Institution: | Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031 |
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| Abstract: | Random fluctuations of turbulence bring random fluctuations of the refractive index, making the atmosphere a random fluctuation medium that destroys the coherence of light-waves. Research in atmospheric turbulence is actually the investigation of the atmospheric refractive index. The atmospheric structure constant of refractive index, C n 2 , is an important parameter denoting atmospheric turbulence. In this paper, C n 2 is measured during the day and at night and in all four seasons using a high sensitivity micro-thermal meter QHTP-2. The vertical profile of C n 2 in Hefei (0–30 km) is investigated by the analysis of experimental data. The average profile of C n 2 in Hefei exhibits conspicuous day and night differences with increased altitude. The distribution of log(C n 2 ) is nearly normal and has conspicuous seasonal differences. |
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| Keywords: | applied optics atmospheric turbulence atmospheric structure constant of refractive index variance profile |
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