我国中低纬地区电离层foE经验模型初步研究

利用电波环境观测网中低纬地区（以满洲里、重庆、昆明、海口为例）电离层f_oE数据，参照前人工作，分析了f_oE月中值与太阳活动指数、太阳天顶角的变化关系，建立了我国中低纬多个地区的f_oE月中值经验模型. 结果表明:f_oE月中值与F_10.7存在很强的相关性（相关系数大于0.9）；与正午太阳天顶角余弦存在反相关性(相关系数绝对值大于0.7)；与实测数据对比发现本文模型计算值标准偏差小于0.1 MHz，优于国际参考电离层(international reference ionosphere, IRI)模型。本文研究对于IRI模型改进与我国区域电离层经验模型研究建立具有重要意义.

Preliminary study on ionospheric foE empirical model in middle and low latitudes of China

This article analyses middle and low latitudes(Manzhouli,Chongqing,Kunming and Haikou)f_oE data from radio environmental observation network.Consulting other researchers’work,we achieve the relationship between the f_oE median monthly value and solar activity F10.7 index and solar zenith angle.The empirical model used in middle and low latitudes of China with the input of F F10.7 and solar zenith angle is established.The results show that there is a positive correlation between the median monthly value of f_oE and F10.7(correlation coefficient above 0.9),and negative correlation between the median monthly value of f_oE and the cosine of solar zenith angle at noon(correlation coefficient above 0.7).Compared with the measured data,it is found that the error standard deviation of the empirical model of f_oE is less than 0.1 MHz and is better than the international reference ionosphere(IRI).This study is of great siginificance to the improvement of IRI model and the establishment of autonomous ionospheric f_oE empirical model in China.