我国广域差分GPS参考站布站选址研究  

Research of Wide Area DGPS Reference Station Placement in China

出　　处：《导航》2005年第4期32-37,共6页

摘　　要：我国广域差分GPS增强系统在服务区域能够为GPS用户提供差分修正值。广域差分参考站是系统的一个重要组成部分，它负责从GPS卫星获得距离测量。这些测量值用来计算差分修正数。因此，参考站站址及数量的选择决定了GPS增强系统的覆盖范围以及对用户的GPS增强效果，为了满足所需导航性能，本文分别从卫星完好性监测、UDRE、GIVE以及覆盖率几个方面分析了我国广域差分GPS参考站布站选址的限制条件，在最优化的条件选择参考站的间距，并且分析了实际条件下布站的原则．Wide-Area-Differential GPS augment system can provide the differential corrections for the users in the service area. Wide-Area-Differential GPS reference stations are definitely the important component in the system. It gets the distance-measurements which can be used to calculate the differential corrections from GPS satellites. So, at some degree, the placement and the numbers can decide the coverage of the system and users＇ accuracy. To meet the Required Navigation Performance （RNP）. this paper analyses the restriction of the placement of the reference stations from the satellite integrated monitor, UDRE,GIVE and the property of coverage, and chooses the space of the reference stations optimally, and analyses the underline of the placement in the practical condition.

关 键 词：广域差分GPS 广域增强系统 参考站 选址 

分 类 号：P228.4[天文地球—大地测量学与测量工程]