Impact of the Ionosphere and GPS Surveying Caused by Solar Storms on August 1,2010

We analyzed the disturbance anomalyin the global ionosphere VTEC caused by solar storm on August 1,2010,based on the GPS ionosphere detection technology.Affected by the Coronal Mass Ejection toward Earth,the solar storm had some impact on the ionosphere VTEC of North American on August 3,and the maximal VTEC anomaly was 15 TECu.Becasue of the earth rotation,the ionosphere VTEC anomaly area would move to the west along with the sun point-blank point,and the ionosphere VTEC anomaly generally occurred at local time 13:00-17:00.In addition,we analyzed the impact of this solar storm on the quality of GPS observation data and ionosphere higher order term error.The result showed that GPS observations weren’t influenced obviously,but this solar storm made ionosphere higher order term error on L1 and L2 carriers larger,and the error influence reached to centimeter level during this solar storm.