Statistical characteristics of vertical profile of refractive index structure parameter in gobi area

Using the platforms of captive balloon and sounding balloon equipped with micro-temperature sensors, atmospheric refractive index structure parameter(C2n) had been measured in arid area for a long time. A statistical analysis based on experimental data of atmospheric refractive index structure parameter was carried out about the average C2n in daytime and nighttime, distribution of standard deviation on height, skewness and kurtosis, as well as the strength characteristics of seasonal variation. The obtained results show that there is a great difference on the ratio of arithmetic mean and logarithmic mean between day and night, the logarithmic mean value and standard deviation coefficient of C2n in daytime and nighttime generally decrease with height while they fluctuate at the same height, especially in nighttime; the difference of the right skewed and leptokurtic characteristics between day and night were indicated for different heights; seasonal changes have significant impact on the strength of turbulence distribution, as for the median turbulence and weak turbulence distribution change interactively at different height.