电离层高阶项延迟对2015-06磁暴期间PPP的影响

摘要

分析了2015年第173～175 d太阳活动对电离层以及地磁场的影响以及磁暴期间电离层延迟高阶项对观测值、静态PPP的影响.结果表明,受173 d爆发的日冕物质抛射和冕洞高速流的共同影响,174 d地磁持续扰动,达到大磁暴水平;L1、L2的二阶项延迟最大值分别达到20 mm、40 mm,三阶项延迟为2 mm、5mm;电离层高阶项延迟对PPP的N方向的影响最为显著,最大值达到了7.1 mm,且呈向南偏移的趋势,对U、E方向影响的最大值可达4.6 mm,但没有一致偏移的规律.%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.