Abstract：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.
