Prototyping Integrity Monitors for PPP Fault Detections

Yu-Fang Lai, Juan Blanch, Todd Walter, Erin Kahr, Edmond Leahy, Pedro Silva, Cameron Ellum

Peer Reviewed

Abstract:	Precise Point Positioning (PPP) is a GNSS positioning technique that is capable of achieving centimeter-level accuracy. A PPP system consists of several reference stations to deliver precise corrections such as precise satellite clock bias and precise ephemeris for the users to minimize the errors. In addition for providing access to the PPP service (corrections), it is also important for the PPP system to ensure the integrity of the user is protected. In this paper, a fault-monitoring system prototype based on fault-tolerant PPP filters is proposed, that is capable of monitoring and detecting possible satellite clock fault in real-time operation for static receiver. Artificial and actual GPS clock faults on PRN-1 on Jan. 25th, Jan. 28th and July. 10th are examined to verify the capability of the filter and the monitoring system. It is shown that the prototype system is able to detect and identify the faulted satellite from the real GPS measurement during the fault period, which indicates the capability of real-time operation for such monitor design.
Published in:	Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023) September 11 - 15, 2023 Hyatt Regency Denver Denver, Colorado
Pages:	2592 - 2605
Cite this article:	Lai, Yu-Fang, Blanch, Juan, Walter, Todd, Kahr, Erin, Leahy, Edmond, Silva, Pedro, Ellum, Cameron, "Prototyping Integrity Monitors for PPP Fault Detections," Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, Colorado, September 2023, pp. 2592-2605. https://doi.org/10.33012/2023.19231
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In