Open AccessTime Synchronization and Performance of BeiDou Satellite Clocks in Orbit
Author(s) -
Chunhao Han,
Zhiwu Cai,
Yu-Ting Lin,
Libo Liu,
Shenghong Xiao,
Zhu Lingfeng,
Wang Xiang-lei
Publication year - 2013
Publication title -
international journal of navigation and observation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.176
H-Index - 18
eISSN - 1687-6008
pISSN - 1687-5990
DOI - 10.1155/2013/371450
Subject(s) - satellite , orbit (dynamics) , sun synchronous orbit , medium earth orbit , remote sensing , orbit determination , geodesy , computer science , synchronous orbit , time transfer , synchronization (alternating current) , ground track , environmental science , physics , geosynchronous orbit , geostationary orbit , geology , telecommunications , aerospace engineering , astronomy , channel (broadcasting) , engineering
The time model of Beidou satellite clocks is analyzed. The general relations of satellite clocks with the system time are studied. The error sources of two-way radio time transfer between satellites and uplink stations are analyzed. The uncertainty of type A is about 0.3 ns in Beidou system. All the satellite clocks in orbit of Beidou satellite navigation system are evaluated by the clock offsets observed by the two-way radio time transfer. The frequency stabilities at a sample time of 10000 s and 1 day for all the satellite clocks are better than 1.0×10-13. It means that the performance of Beidou satellite clocks in orbit is consistent with the ground test, and the results in orbit are a little better than those in ground vacuum. © 2013 Han Chunhao et al.
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