卫星导航定位系统(三十)

Satellite Navigation System(ⅩⅩⅩ)

补充介绍了美国、俄国、欧盟、中国和印度等国在发展卫星导航定位系统方面的某些内容,并阐述了日本“准天顶卫星导航定位系统”和间谍卫星的情况。

This paper makes additional introduction to some contents of the satellite navigation system developed by America, Russia, European Union, China and India, and expounds the situation of the quasi-zenith satellite navigation system and spay satellite developed by Japan.