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.
Time Synchronization and Performance of BeiDou Satellite Clocks in Orbit
International Journal of Navigation and Observation ; 2013 ; 1-5
2013
5 Seiten, 10 Quellen
Aufsatz (Zeitschrift)
Englisch
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