Satellite-ground time synchronization system and method

Abstract

The present invention provides a satellite-ground time synchronization system and method. The satellite-ground time synchronization system and method realize high-precision satellite-ground time synchronization based on a communication satellite measurement and control channel. The system comprises: a satellite time management and measurement and control response module taken as a core to realize time information interaction with a ground system through an uplink and a downlink; a high and stable frequency source configured to provide high and stable frequency; a central remote measurement module configured to send the whole satellite remote measurement data flow and collect the remote measurement quantity of the module; a central remote control module configured to receive a remote control instruction and send a data management instruction; and a central computer configured to perform satellite time broadcast between a RS422 bus and the module. Through fully employing synchronization track communication satellite measurement and control channel resource, the satellite-ground time synchronization system and method are able to avoid the introduce of other errors on a channel, realize the organic unification of a satellite-ground time synchronization function and a traditional measurement function, and are small in system modification, small in resource occupation and high in realizability so as to allow the satellite system to have satellite time with higher precision and stability and expand the function category of Chinese traditional communication satellite measurement and control subsystem.

Description

technical field [0001] The invention belongs to the field of satellite communication, and relates to a satellite-ground time synchronization technology for communication satellite measurement and control channels, in particular to a high-precision satellite-ground time synchronization system and method suitable for geosynchronous orbit communication satellites, which can realize high-precision satellite time Maintenance, satellite time calibration, time service and satellite time broadcasting and other functions. Background technique [0002] The communication satellite measurement and control subsystem is an important part of the satellite system. During the long-term management process of satellite launch, positioning and delivery, it must cooperate closely with the ground measurement and control network to provide complete telemetry, remote control and tracking services. Satellite monitoring and control tasks. With the continuous expansion of geostationary communication ...

AI Technical Summary

Problems solved by technology

With the continuous expansion of geostationary communication satellite services, satellite users gradually put forward new requirements for the accuracy and stability of satellite time. For example, some satellite users need to know the exact time when the satellite load forwards and downloads data. information, while traditional synchronous orbit communication satellites do not yet have the functions of precise maintenance, calibration, timing and satellite time broadcasting of satellite time, and cannot meet the corresponding needs

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