A study on onboard satellite atomic clock autonomous integrity monitoring

作者：Tang Sheng^*; Liu Ya; Li Xiao Hui

来源：Journal of Astronautics, 2013, 34(1): 39-45.

DOI：10.3873/j.issn.1000-1328.2013.01.006

• Conventional methods
• Failure alarms
• Frequency measurements
• Ground-based augmentation systems
• Integrity monitor
• Integrity monitoring
• Least Square
• Navigation satellites
• Time-to-alert

The problem of the onboard satellite atomic clock integrity monitoring is considered in this paper. The conventional method of ground-based augmentation system has the drawbacks of high dependence on the ground and poor timeliness of failure alarm. According to the analysis of common failure modes of the onboard satellite atomic clock and the consequent influences on the system performance, an onboard satellite atomic clock autonomous integrity monitor scheme based on digital sin-beat frequency measurement and least square clock difference prediction is proposed. The experiment results verify the improvement of the proposed scheme and show that the onboard satellite atomic clock signal anomaly detecting and alerting can be completed in one second.

• 出版日期2013