| 大气折射率结构常数Cn^2高度分布统计特性分析 |
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| 引用本文： | 孙刚,翁宁泉,肖黎明. 大气折射率结构常数Cn^2高度分布统计特性分析[J]. 光电子技术与信息, 2011, 0(2): 83-88 |
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| 作者姓名： | 孙刚 翁宁泉 肖黎明 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室,安徽合肥230031 |
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| 基金项目： | 科技基础性工作专项重点项目（2007FYl10700）资助E-mail：gsun◎aiofm.ac.cn |
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| 摘 要： | 大气折射率结构常数Cn^2是表示大气光学湍流强度的一个重要参数，利用温度脉动探空仪对合肥地区大气折射率结构常数进行了长期连续的实地探空测量，对大量探空实验数据的统计分析得出合肥地区（0-25km）折射率结构常数随高度的分布廓线，并对其进行统计矩和概率分布的分析，研究表明合肥地区大气湍流随高度分布基本符合对数正态分布，昼夜变化量约为0．8个量级，大气折射率结构常数Cn^2的概率分布存在昼夜差异，白天的Cn^2比夜间的Cn^2峰值要大2个数量级。
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| 关 键 词： | 大气湍流 大气折射率结构常数 分布廓线 统计矩 概率 |
Statistical Characteristics of Vertical Distribution of Atmospheric Structure Constant of Refractive Index Cn^2 |
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| SUN Gang,WENG Ning-quan,XIAO Li-ming. Statistical Characteristics of Vertical Distribution of Atmospheric Structure Constant of Refractive Index Cn^2[J]. Optoelectronic Technology & Information, 2011, 0(2): 83-88 |
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| Authors: | SUN Gang WENG Ning-quan XIAO Li-ming |
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| Affiliation: | (Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China) |
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| Abstract: | The atmospheric structure constant of refractive index Cn^2 is an important parameter of denoting atmospheric turbulence. The Cn^2 is measured both in noonday and at night in everyday at all seasons in Hefei, respectively, using QHTP-2 micro-thermal meter. The vertical profile of Cn^2 in Hefei（0,-25 km）is investigated by analysis of experimental data, and the statistical matrix and statistics distribution is discussed in detail. It＇s shown that variance profile of Cn^2 in Hefei coincide with lognormal distribution, the probability distribution of Cn^2has conspicuous difference day and night. |
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| Keywords: | atmospheric turbulence atmospheric structure constant of refractive index variance profile statistical matrix probability |
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