Analysis of Correction Effect of Ionospheric Model During Geomagnetic Storm

摘要

Geomagnetic storms are a common natural phenomenon caused by solar activity and other factors, which are closely related to human production activities. In this paper, four ionospheric models during geomagnetic storms (130-136) are analyzed by selecting four stations in the Asia-Pacific region. The results show that during the occurrence of geomagnetic storms, the impact on the middle latitude region is higher than that in the low latitude region. For stations near the same latitude, the variation of VTEC is the same, and the range of variation is roughly the same. The correction rate of BDSK8 model is lower than that of BDGIM, GPSK8, NeQuick in low latitudes. At the same time, BDSK8 is more sensitive to negative phase disturbance of the ionosphere. In mid-latitudes, the correction rate of four models of large magnetic storms occurred in 134 days has a certain decline, the range of decline is about 2%-5%, The NeQuick model has a slightly worse correction effect at middle latitudes during the geomagnetic storms.