Distributed Orbit Determination for Global Navigation Satellite System with Inter-Satellite Link
1
School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China
2
State Key Laboratory of Astronautic Dynamics, Xi’an 710043, China
3
Undergraduate School, National University of Defense Technology, Changsha 410073, China
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(5), 1031; https://doi.org/10.3390/s19051031
Received: 22 January 2019 / Revised: 21 February 2019 / Accepted: 23 February 2019 / Published: 28 February 2019
(This article belongs to the Collection Positioning and Navigation)
To keep the global navigation satellite system functional during extreme conditions, it is a trend to employ autonomous navigation technology with inter-satellite link. As in the newly built BeiDou system (BDS-3) equipped with Ka-band inter-satellite links, every individual satellite has the ability of communicating and measuring distances among each other. The system also has less dependence on the ground stations and improved navigation performance. Because of the huge amount of measurement data, the centralized data processing algorithm for orbit determination is suggested to be replaced by a distributed one in which each satellite in the constellation is required to finish a partial computation task. In the present paper, the balanced extended Kalman filter algorithm for distributed orbit determination is proposed and compared with the whole-constellation centralized extended Kalman filter, the iterative cascade extended Kalman filter, and the increasing measurement covariance extended Kalman filter. The proposed method demands a lower computation power; however, it yields results with a relatively good accuracy.
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Keywords:
inter-satellite link; whole-constellation centralized extended Kalman filter; distributed orbit determination; iterative cascade extended Kalman filter; increased measurement covariance extended Kalman filter; balanced extended Kalman filter
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MDPI and ACS Style
Wen, Y.; Zhu, J.; Gong, Y.; Wang, Q.; He, X. Distributed Orbit Determination for Global Navigation Satellite System with Inter-Satellite Link. Sensors 2019, 19, 1031.
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