Analysis on Effects of L-Band Solar Radio Bursts on GNSS

The strong L-band solar radio bursts will affect the navigation signals captured and tracked by the Global Navigation Satellite System (GNSS) receivers located in the sunlit hemisphere (sunny side), thus affecting the stability and accuracy of GNSS services. In this paper, an L-band solar radio burst erupted on August 28, 2022 was detected and analyzed based on GNSS Monitor System. Similar to December 13, 2006, the incident affected the GNSS tracking stations in the sunny side to varying degrees. Based on IGS data and low orbit satellite data, the characteristics and influence of the two events are compared. The analysis results show that: (1) solar L-band radio bursts will have different degrees of impact on the sun side navigation users; (2) the influence degree is positively correlated with the solar altitude angle; (3) the influence mode is similar to space-based suppression interference.