摘要
日本国境内地面多山和多城市峡谷地形的特点,使用GPS导航系统存在观测卫星数量不足、几何精度因子条件不好等缺陷,日本专家学者提出发展自己的区域卫星导航系统,来增强GPS导航系统以提高由于障碍物不能观测有效数量卫星地区的用户导航性能。主要介绍了日本研究建设的GPS增强系统-QZSS系统的设想,针对系统星座构成、信发播号体制、导航系统组成,以及发展进度和性能进行了分析。
Based on the mountain and city canyon terrains all over the Japan, and insufficient observation satellite quantity and poor PDOP qualification when only GPS is used, Japanese experts bring forward to develop their own regional satellite navigation system to enhance the user navigation performance in the area without sufficient satellites available due to obstables. This paper mainly introduced a Japanese GPS augmentation system-QZSS and its constellation constitute, broadcast signal system, system composition and development progress.
出处
《无线电工程》
2009年第6期37-39,共3页
Radio Engineering
