电离层顶部电子浓度剖面的反演与建模研究

电子浓度剖面是反映电离层全貌的重要参数，对无线电波的传播有重要影响。目前广泛使用的地基垂直探测和GPS-TEC观测方式都只能得到电子浓度的部分信息，无法直接获得顶部电子浓度剖面。本项目在对卫星顶部探测数据分析研究基础上，建立我国中纬武汉地区上空电离层顶部过渡高度的经验模式，结合GPS-TEC给出的电子浓度总含量信息，完善并修正电离层测高仪底部观测外推的顶部剖面，探讨在不同地球物理条件下顶部剖面反演算法的适用性，以此为基础发展NmF2、hmF2和GPS-TEC观测数据驱动的电离层顶部电子浓度剖面模式，为我国电离层顶部特性的研究提供方法和数据支持。

Electron density profile is an important parameter characterizing the whole ionosphere. It has major impact on the radio wave propagation. As the most widely used technique, vertical sonding and GPS-TEC observation can only yield part information of the electron density, and cannot give the topside ionospheric electron density profile. Based on analysis of the satellite topside vertical sonding data, our project will set up the empirical model of upper transition height of topside ionosphere over the mid-latitude Wuhan region of China, which combines the total electron content observed by GPS-TEC measurement to correct the topside ionospheric electron density profile reconstructed from the bottom side ionosonde measurement. And then we will investigate the vilidation of the reconstruction algorithm under different geophysical conditions and develop the ionosonde and GPS-TEC data drived topside electron density profile model. The development of this reconstruction algorithm will offer method and data support for topside ionosphere research.