统计分析了2014年4月至5月期间温度脉动仪和超声风速计测量的成都地区折射率结构常数C2n数据。结果显示: 无论是白天还是夜晚,两种方法测量C2n的结果基本一致。与合肥地区相比, C2n的日变化特 征明显但转换时刻存在差异。在10-15～10-13m-2/3量级温度脉动仪和超声风速计测 量C2n的频数分别是74.05%、84.40%;小于10-15的频数分别是24.07%、10.63%;大于10-13的频数 分别是1.89%、4.97%。温度脉动仪和超声风速计测量C2n的关系为y=－8.5694×10－16+0.6520x,相关 系数为99.24%,并简要分析了两种 方法测量C2n偏差的可能原因。

The refractive index structure parameter C2n from April to May in 2014 measured by the temperature pulsating instrument and sonic anemometers in Chengdu was statistically analyzed. The results of C2n measured by two methods agree well with each other both in day and at night. Compared with Hefei, the diurnal variation of the C2n is obvious but conversion time is different. Between 10-15 and 10-13 level, C2n frequencies measured by the temperature pulsating instrument and sonic anemometers are 74.05% and 84.40% respectively; the frequencies less than 10-15 are 24.07% and 10.63% respectively; the frequencies greater than 10-13 are 1.89% and 4.97% respectively. The relationship of C2n measured by sonic anemometers and temperature pulsating instrument is y=－8.5694×10－16+0.6520x, the correlation coefficient is 99.24%, and the possible causes of the C2n deviation measured by two methods was analyzed in brief.