在轨卫星与地面时钟精确同步方法研究  

On the Methods to Keep Satellite/Ground Clocks Synchronous Accurately

作　　者：杨天社[1] 李怀祖[1] 

机构地区：[1]西安交通大学,陕西西安710049

出　　处：《系统工程与电子技术》2002年第5期103-105,共3页Systems Engineering and Electronics

摘　　要：卫星的正常运行和应用依赖于在轨卫星星上时间与地面时钟的精确同步 ,星地时间的精确同步是通过地面测控系统对星上时间进行校正实现的。精确确定星地时差是确保时间校正正确性和准确性的关键。分析了卫星星上时间码产生的原理和结构 ,提出了精确计算星地时差的模型。The normal operation and applications of a satellite depend on the accurate synchronization of the satellite clock and ground clock. In order to keep the time of the satellite clock accurately, it is critical to precisely determine the time difference between the satellite clock and ground clock by correcting the satellite clock time. In this paper, the principle and mechanism of the onboard time generation are analyzed, and the methods that are used for calculating the time difference between the satellite clock and ground clock and for handling the leap seconds are also presented.

关 键 词：在轨卫星 地面时钟 同步方法 

分 类 号：V423.4[航空宇航科学与技术—飞行器设计]