北斗系统电离层修正抗扰动能力分析

利用2017-09太阳耀斑爆发期间、2018-08地磁暴及高能电子暴期间、2017-08九寨沟地震期间电离层模型及格网电离层数据，分析电离层异常对北斗系统电离层模型修正精度的影响，进一步分析格网点电离层信息的抗扰动能力。结果表明，太阳耀斑、地磁暴、高能电子暴以及地震均对电离层变化有不同程度的影响；电离层异常期间北斗系统电离层模型修正精度普遍降低，修正率下降30%～60%，抗扰动能力较差；格网点电离层信息修正精度基本未受影响，抗扰动能力较强。

Analysis of Anti-Disturbance Capability of Ionospheric Correction for BDS

We use ionospheric model data and GIM data during solar flares in September 2017, high-energy electron storms in August 2018, geomagnetic storms in April 2017 and the Jiuzhaigou earthquake in August 2017. We analyze the influence of ionospheric anomaly on the correction accuracy of the BDS ionospheric model, and further analyze the anti-disturbance ability of ionospheric grid information. The results show that solar flares, geomagnetic storms, high energy electron storms and earthquakes, all have different effects on the ionospheric variation. During ionospheric anomaly periods, the correction accuracy of the BDS ionospheric model generally decreases, the correction rate decreases by 30% and 60%, and the anti-disturbance ability is poor, while the correction accuracy of the ionospheric grid information is basically unaffected and the anti-disturbance ability is relatively strong.