中国将于2020年完善北斗卫星导航系统
[font=Verdana, Arial, Tahoma][size=14px][b]The Chinese government on Thursday released a white paper elaborating on the action plan for the BeiDou Navigation Satellite System (BDS), which has been independently developed and operated by China.[/b][/size][/font][font=Verdana, Arial, Tahoma][size=14px][b]中国政府周四就北斗卫星导航系统的详细执行方案发布一份白皮书，该系统由中国独立研发运营。[/b][/size][/font]
[font=Verdana, Arial, Tahoma][size=14px]China has formulated a three-step strategy for developing the BDS, according to the document released by the State Council Information Office (SCIO). The aim is to complete the deployment of the 35 [url=http://www.enread.com/news/politics/104867.html]satellite[/url] constellation around 2020 to provide services to global users.[/size][/font]
[font=Verdana, Arial, Tahoma][size=14px]This is the first white paper on the navigation satellite system. It is also the 100th white paper released by the SCIO.[/size][/font]
[font=Verdana, Arial, Tahoma][size=14px]Initially, China aimed to provide services to domestic users. The following stage featured the expansion of the network to cover the Asia-Pacific region, which was achieved by the end of 2012.[/size][/font]
[font=Verdana, Arial, Tahoma][size=14px]Currently, B1I and B2I open service signals are being broadcast by the operating BDS-2, providing open services to the Asia-Pacific region free of charge, according to the white paper.[/size][/font]
[font=Verdana, Arial, Tahoma][size=14px]The services cover an area between 55 degrees north latitude and 55 degrees south latitude, and between 55 and 180 degrees east longitude, with positioning accuracy less than 10 [url=http://www.enread.com/news/politics/104867.html]meters[/url], velocity measurement accuracy less than 0.2 meters per second, and timing accuracy less than 50 nanoseconds.[/size][/font]
[font=verdana, arial, tahoma][size=14px]更多[/size][/font][b][size=24px][url=http://www.enread.com/news/]英语新闻[/url][/size][/b]
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