| 摘要 |
The invention relates to a method and a device for synchronizing one or more remote clocks ( 2 ) to a central clock ( 1 ) via a bi-directional satellite radio link ( 9.1, 9.2 ). Time and data signals are exchanged via suitable transmitting ( 8, 12 ) and receiving devices ( 5, 11 ) at both ends of the radio link. From time difference measurements ( 6, 14 ) at both ends a control signal ( 17 ) is derived in such a manner that the clock ( 2 ) installed directly in the remote ground station devices ( 11 ) synchronizes in state and rate to the central clock ( 1 ) with the aid of the two-way method (TWSTFT, Two-Way Satellite Time and Frequency Transfer). The user has access to time signals ( 18 ) which directly represent the state of the central clock ( 1 ). The signals used for the time measurement are also used for data transmission, resulting in a system operating in real time in which the control deviations ( 15, 16 ) of the remote clock are accessible at both ends of the system. |
