地基GNSS电离层层析方法及应用

Research and Application of Ionospheric Tomography Method Based on Ground-Based GNSS

随着GALILEO、GLONASS和BDS等系统的快速发展,全球导航卫星系统GNSS(Global Navigation Satellite System)为电离层层析技术的应用带来大量的观测数据,可弥补单星座条件下地面观测站点少和观测视角有限等不足。本文利用多星座GNSS的观测数据,通过融合定权的方式,提出一种基于地基GNSS的电离层层析方法,求解出高精度的电离层电子含量值。利用该方法反演出欧洲区域上空的电子密度。实验结果表明,多星座GNSS反演的精度要优于使用单GPS数据的结果。并将该方法应用到磁暴探测中,与垂测仪的观测结果进行比较,验证了多星座GNSS电离层层析方法的可行性和优越性。

With the rapid development of satellite systems such as GALILEO,GLONASS and BDS,a large amount of observation data to the application of ionospheric tomography is brought by the Global Navigation Satellite System(GNSS),which can compensate for the lack of ground observation sites under single constellation conditions,as well as limited observation angles.In this paper,through integration and fixed weights,an ionospheric tomography method based on multi-constellation GNSS is proposed in order to solve the high-precision ionospheric electron content value.The electron density over the European region is inverted by using this method,and the experimental results show that the accuracy of multi-constellation GNSS inversion is better than the results of using single GPS data.This method is also applied to the magnetic storm detection,and compared with the observation results of the vertical detector to verify the feasibility and superiority of the multi-constellation GNSS ionospheric chromatography method.