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Article

BeiDou Satellite Unhealthy States and the Impact on System Performance

by 1,2, 1,*, 1,2, 1 and 2
1
GNSS Research Center, Wuhan University, Wuhan 430072, China
2
Beijing Satellite Navigation Center, Beijing 100094, China
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(12), 4196; https://doi.org/10.3390/s18124196
Received: 5 October 2018 / Revised: 22 November 2018 / Accepted: 27 November 2018 / Published: 30 November 2018
(This article belongs to the Section Remote Sensors)
The BeiDou system satellites may be unhealthy due to many reasons, affecting system performance in different ways. Therefore, it is important to analyze the causes and characteristics of the satellites’ unhealthy states. In this study, these states are classified into five types based on the broadcast ephemeris. Three criteria are presented, based on which a general classification method is proposed. Data from July 2017 to June 2018 are analyzed to validate the method, from which we know that the average unhealthy duration due to satellite maneuvers is much longer than the duration of unhealthy states related to satellite orbit or clock anomalies, and the other unhealthy states may be caused by inbound or outbound satellites. Statistics show that most of the time, the number of unhealthy satellites is no more than two and the average positioning accuracy in the service area will decrease by no more than 0.75 and 1.2 meters when one or two BDS satellites are unhealthy, respectively. View Full-Text
Keywords: BeiDou; unhealthy state; broadcast ephemeris; maneuver BeiDou; unhealthy state; broadcast ephemeris; maneuver
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MDPI and ACS Style

Hu, C.; Shi, C.; Chen, J.; Lou, Y.; Wang, F. BeiDou Satellite Unhealthy States and the Impact on System Performance. Sensors 2018, 18, 4196. https://doi.org/10.3390/s18124196

AMA Style

Hu C, Shi C, Chen J, Lou Y, Wang F. BeiDou Satellite Unhealthy States and the Impact on System Performance. Sensors. 2018; 18(12):4196. https://doi.org/10.3390/s18124196

Chicago/Turabian Style

Hu, Caibo, Chuang Shi, Jinping Chen, Yidong Lou, and Fei Wang. 2018. "BeiDou Satellite Unhealthy States and the Impact on System Performance" Sensors 18, no. 12: 4196. https://doi.org/10.3390/s18124196

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