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35颗卫星覆盖全球！中国启动北斗三号：要啥GPS？_IT新闻
source link: http://news.cnblogs.com/n/578699/
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据央视报道，我国北斗三号全球定位系统已经正式启动建设，计划今年底将发射两组四颗全球组网卫星。北斗是中国正在实施的自主发展、独立运行的全球卫星导航系统，可在全球范围内全天候、全天时为各类用户提供高精度、高可靠定位、导航、授时服务，并具有独特的短报文通信功能。正在建设的北斗三号系...
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