摘要
利用我国20个测站常规探空资料,运用大气折射理论和统计学方法建立了大气折射垂直分布的三种统计模式。分析结果表明:目前使用的4/3地球半径模式精度较差,只有在离地面1km高度以下使用,才能保证精度;改进的等效地球半径模式精度最高;指数模式在离地面3km高度以下使用。
An attempt is made to establish three statistical models for vertical distribution of atmospheric refractive index based on the theory and approach with the aid of conventional radiosonde record from the selected 20 stations in China. Results show that Ⅰ) the 4/3 equvalent earth′s radius model yields minimum accuracy and is applicable to within 1 km of the surface; Ⅱ) the modified version gives maximum accuracy; Ⅲ) the exponential model is effective in the lowest 3 km.
出处
《南京气象学院学报》
CSCD
1996年第4期456-463,共8页
Journal of Nanjing Institute of Meteorology
基金
八五气象科学基金
关键词
大气折射
折射指数
垂直分布
统计模式
atmospheric refractive index, statistical model, equivalent earth′s radius, refrerence atmosphere, ray trajectory