Analysis of the Influence of Geomagnetic Storms on the Ionospheric Model of Beidou/GPS System

Geomagnetic storm activity will cause a certain degree of disturbance on the global ionosphere; ionospheric model error which is one of the main error sources of satellite navigation system will affect the service performance of the satellite navigation system. In order to analyze the influence of geomagnetic storms on the satellite navigation system, especially the Beidou satellite navigation system, this paper takes a strongly storm which took place from March 9th, 2015 to March 21st as an example, respectively, analyze BDS and GPS ionospheric delay precision when ionosphere is quiet or disturbed. Further, it makes contrast the difference of positioning accuracy between BDS and GPS when ionopheric disturbance happened in March, 2015. The results show that BDS and GPS ionopheric model are affected by the storm, both the ionopheric model correction rate and service performance are decreased.