全球卫星导航系统的发展概况

Development of the Global Satellite Navigation Systems

今天,卫星导航系统已经在大量应用中广泛使用,而且总的发展趋势是为实时应用提供高精度服务。迄今为止,比较完善的卫星导航系统已经有美国GPS和俄罗斯CLONASS系统,它们的定位和定时精度都能满足严格的军用定位和定时要求。面对大量的卫星导航需求,欧洲计划推出自己的卫星导航系统Galileo。本文对现有的GPS和GLONASS系统进行了描述和比较,并对Galileo系统的计划方案进行了简要说明。

Satellite navigation systems are in widespread use in a large number of applications today, and a general trend is the demand for higher accuracy in real-time applications.So far, the advanced satellite navigation systems such as the American GPS and Russian GLONASS systems can provide highly accurate positioning and time-stamping services for the army.As the satellite navigation market grows, Europe is planning to launch its own Galileo satellite navigation system.In this paper, the existing GPS and GLONASS systems are described and compared, and the Galileo system proposal is also briefly introduced.