中国将于2020年完善北斗卫星导航系统 中国, China, 卫星导航

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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.

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。

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 satellite constellation around 2020 to provide services to global users.

This is the first white paper on the navigation satellite system. It is also the 100th white paper released by the SCIO.

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.

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.

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 meters, velocity measurement accuracy less than 0.2 meters per second, and timing accuracy less than 50 nanoseconds.
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