摘要
近年来,随着全球导航定位系统的战略作用与地位日渐突出及其在促进经济社会发展中的地位日益显著,越来越多的国家和地区开始着手或加强该它的建设。本文概述了世界几大卫星导航系统的现状,并对其主要参数进行了简要的介绍和比较,展望了卫星导航系统的发展趋势。
In recent years,with the global navigating and positioning system progressively showing its importance in strategy and promotion of economic society＇s development,more and more countries and regions commenced to establish or improve the navigation system.This paper addressed current situation of several world wide satellite navigation systems,presented and compared the main parameter briefly,and expected the developing trend of the satellite navigation system.
出处
《现代测绘》
2011年第3期3-6,共4页
Modern Surveying and Mapping
关键词
卫星导航系统
现状
比较
satellite navigation system
current situation
comparison
