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 C2 nin daytime and nighttime,distribution of standard deviation on height,skewness and kurtosis,as well as the strength characteristics of seasonal variation.The obtained resul...