光学学报, 2016, 36 (8): 0801003, 网络出版: 2016-08-18
中国西部典型地区整层光学湍流观测与分析
Measurement and Analysis of Integral Optical Turbulence at Western Typical Zones in China
大气光学 大气相干长度 等晕角 对数正态分布 相关性分析 atmospheric optics atmospheric coherence length isoplanatic angle log-normal distribution correlation analysis
摘要
基于大气相干长度和等晕角综合测量系统在中国西部地区的长期测量资料,分析了大气相干长度和等晕角的时间变化和统计分布特征,给出了白天、夜间、傍晚转换时刻三个时段大气相干长度和等晕角的平均值和标准差。对原始数据的概率分布统计表明,不同地区不同月份大气相干长度和等晕角近似满足对数正态分布,并采用样本偏度和样本峰度描述样本分布同正态分布的偏离程度。分析了大气相干长度和等晕角月平均值的相关性,定性评估了不同时段高层湍流和近地湍流对大气相干长度和等晕角的贡献。
Abstract
The temporal and statistical properties of atmospheric coherence length and isoplanatic angle are investigated, based on the long-term measured datum of synthetic measuring system of atmospheric coherence length and isoplanatic angle in the west of China. Meanwhile the mean and standard deviation of atmospheric coherence length and isoplanatic angle in three periods of daytime, nighttime and dusk are given. The probability distributions of initial data show that both atmospheric coherence length and isoplanatic angle are approximately satisfied with log-normal distribution. Besides, the distribution deviation between the sample distribution and log-normal distribution is estimated by sample skewness and sample kurtosis. The correlation between monthly mean of atmospheric coherence length and isoplanatic angle is analyzed, and the effects of the magnitude of upper air and surface turbulence on atmospheric coherence length and isoplanatic angle are evaluated qualitatively.
陈小威, 李学彬, 刘庆, 孙刚, 张守川, 朱文越, 翁宁泉. 中国西部典型地区整层光学湍流观测与分析[J]. 光学学报, 2016, 36(8): 0801003. Chen Xiaowei, Li Xuebin, Liu Qing, Sun Gang, Zhang Shouchuan, Zhu Wenyue, Weng Ningquan. Measurement and Analysis of Integral Optical Turbulence at Western Typical Zones in China[J]. Acta Optica Sinica, 2016, 36(8): 0801003.