Abstract:In this paper, we analyze both the impact of solar radiation during doy 173 to 175 of 2015 on the global ionosphere and the magnetic field, and the influence of higher-order ionosphere on observation and static precise point positioning during a geomagnetic storm. Numerical experimental results show that, affected by the coronal mass ejection in doy 173, the magnetic field is disturbed by a large geomagnetic storm. The maximal second-order ionospheric correction of L1 and L2 is 20 mm and 40 mm. The maximal third-order ionospheric correction of L1 and L2 is 2 mm and 5 mm. Furthermore, the influence of HOI on PPP is mainly visible in the northern direction, showing a southward migration trend, where the maximal influence value is up to 7.1 mm. But the maximal influence value in the direction of U, E is up to 4.6 mm, and is disordered.
LI Yangyang,LIU Zhimin,UO Jinyun et al. Influence of Higher-Order Ionospheric Delay on PPP during Geomagnetic Storm in June 2015[J]. jgg, 2017, 37(8): 845-848.