一种新的电离层区域重构方法  

A new ionosphere region reconstruction algorithm

作　　者：郭靖 方学立[1] 郭文玲[2] 梁奉超 GUO Jing;FANG Xueli;GUO Wenling;LIANG Fengchao(Unit 93184 of PLA,Beijing 100076,China;China Research Institute of Radiowave Propagation,Qingdao 266107,China)

机构地区：[1]中国人民解放军93184部队,北京100076 [2]中国电波传播研究所,青岛266107

出　　处：《电波科学学报》2020年第6期949-955,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61831010)。

摘　　要：针对以电离层模型为参考的电离层重构算法对模型依赖性强、计算复杂、适应性不强的问题,提出了一种不依赖于参考模型的电离层区域重构算法,其仅依靠区域内的采样数据对区域电离层分布进行重构.该算法首先根据重构区域覆盖范围内分布的多个垂测站实测的fcF2,构造经度因子、纬度因子与fcF2关系式,重构出区域内任一点的fcF2;然后选取一个垂测站为基准,构造基准站fcF2、fcF1与重构对应点的fcF2扩展因子的关系式,以及重构距离点上任一高度上的等离子体频率与扩展因子、基准站fcF1的关系式,通过该扩展因子及关系式即可得到区域内的电子浓度情况.与均匀电离层假设下合成的斜测描迹相比,本文重构方法合成的斜测描迹更接近真实值,且试验表明其进一步提升了电离层重构的精度.In order to solve the problem that the ionospheric reconstruction algorithm based on the ionospheric model has strong dependence on the model,complex calculation and poor adaptability,an ionospheric region reconstruction algorithm which does not rely on the reference model is proposed and only rely on the sampling data in the region to reconstruct the regional ionospheric distribution.The algorithm is based on the measured fcF2 of a plurality of vertical stations distributed in the coverage area for reconstruction.Firstly,the relationship between longitude factor,latitude factor and fcF2 is constructed,followed by calculation of the fcF2 at any point in the region.A vertical station is selected as a reference station.The relationship between the expansion factor of fcF2,fcF1 and the corresponding reconstructed fcF2 is constructed.The relationship between plasma frequency and spreading factor and reference station fcF1 at any height at the corresponding distance is constructed.Through the expansion factor and the relation,the electron concentration in the region can be obtained.Compared with the oblique trace synthesized under the assumption of uniform ionosphere,the oblique trace synthesized by the proposed reconstruction method is closer to the real value.It shows that the algorithm in this paper can further improve the accuracy of ionospheric region reconstruction.

关 键 词：电离层 等离子体频率 电离层重构 经纬度因子 临界频率 

分 类 号：P352[天文地球—空间物理学]