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利用GPS电离层探测技术分析了2010-08-01太阳风暴对全球电离层VTEC造成的扰动异常影响。受朝向地球的日冕物质抛射影响,08-03首先对北美地区电离层VTEC产生扰动异常,最大值达到15TECu。由于地球自转,发生电离层VTEC异常集中的区域会随太阳直射点向西移动,一般发生于其所在区域的地方时13:00～17:00。另外,还分析了此次太阳风暴对GPS观测数据质量及电离层高阶项误差的影响。结果表明,此次太阳风暴期间,GPS观测数据质量并未受到明显的影响,但使得L1、L2载波的电离层高阶项误差增大,误差影响达到cm级。
The ionospheric GPS technology was used to analyze the anomaly of the disturbance caused by the solar storm on global ionospheric VTEC from August 1, Affected by the coronal mass projectile toward the Earth, 08-03 first produced anomalous disturbance to the ionospheric VTEC in North America with a maximum of 15 TECu. Due to the rotation of the Earth, the area where the ionospheric VTEC is abnormally concentrated moves westward with the direct sun, usually occurring in the area where it is located from 13: 00-17: 00. In addition, the impact of the solar storm on the quality of GPS observations and the high-order ionospheric errors is also analyzed. The results show that during the solar storm, the quality of GPS observations is not significantly affected, but the error of the high-order ionospheric L1 and L2 carriers increases with an error of cm.