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Published in:
2020 | OriginalPaper | Chapter
Research on a New On-orbit Control Strategy of Onboard Atomic Clock of Navigation Satellite
Authors : Maolei Wang, Jun Lu, Shenghong Xiao, Shichao Wang, Sijia Yang
Published in: China Satellite Navigation Conference (CSNC) 2020 Proceedings: Volume II
Publisher: Springer Nature Singapore
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Abstract
Onboard atomic clock is mainly used for the generation of time and frequency signals of navigation satellite. It is one of the core devices that determine the service performance of navigation satellite. Due to the limitation of its performance and the number of bits in navigation message, the onboard clock usually needs to be controlled and adjusted many times in its life cycle. Based on the analysis of the onboard clock performance characteristics and control methods in current satellite navigation system, a new on-orbit control strategy of the onboard clock is proposed, first of which is to maximize the control period and the second is to avoid impacting service of the satellite when the control is necessary. Theoretical analysis and simulation experiment are carried out, and the results show that the strategy is feasible. This paper is of great significance to the precious operations and service ability promotion of the satellite navigation system.