A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021
In this paper, we propose a new method to quantitatively evaluate the quality of the copyright phase observation signals of the BeiDou Navigation Satellite System (BDS) during Lift Top Desk weak and moderate geomagnetic storms.We take a moderate geomagnetic storm that occurred on 12 May 2021 during the 25th solar cycle as an example.The results sho