| Summary: | Abstract Geomagnetic storms, precipitated by solar phenomena such as coronal mass ejections (CMEs), profoundly disturb the Earth's magnetic field, impacting satellite‐based navigation systems. This study analyzed the effect of a moderate geomagnetic storm on 1 December 2023, on single‐point positioning (SPP) accuracy across various Chinese regions, focusing on the BeiDou Navigation Satellite System (BDS) and Global Positioning System (GPS). Through quantitative analysis of the correlation between storm intensity and signal attenuation, we evaluated the vulnerability of SPP systems to space weather events during the 1 December 2023. Our investigation demonstrates a robust correlation between geomagnetic storm intensity and the degradation of SPP signals, with moderate storms causing the most substantial disruptions in positioning accuracy. The findings underscore the critical need for enhanced resilience in satellite navigation systems against geomagnetic disturbances. This study contributes essential insights into the susceptibility of global navigation satellite systems to space weather, paving the way for the development of more robust navigation solutions.
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