准天顶卫星系统
- 网络QZSS;Quasi-Zenith Satellite System
准天顶卫星系统-
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 .