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Time Synchronization and Performance of BeiDou Satellite Clocks in Orbit
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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 . 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.
Title: Time Synchronization and Performance of BeiDou Satellite Clocks in Orbit
Description:
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 .
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.
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