北斗卫星导航系统民用单频定位性能分析

摘要

The article analyses positioning performance of B1 I signal based on test in the nine regions,including Sanya,Shantou,Ningbo,Lhasa,Chengdu,Qingdao,Beij ing,U-rumchi and Harbin.The results show that,in the domestic area,the number of visible satel-lites at least 7,in accordance with the 95% confidence level statistics,PDOP value is less than 4,horizontal positioning accuracy better than 7 m,vertical positioning accuracy better than 10 m.On the horizontal positioning accuracy less than 15 m and vertical positioning ac-curacy less than 15 m terms,usability is more than 99%,continuity more than 98%.%在三亚、汕头、宁波、拉萨、成都、青岛、北京、乌鲁木齐和哈尔滨等九个地区，对系统民用开放信号B1 I的定位性能进行了试验评估。结果表明，在国内区域，可见卫星数最少为7颗，按照95％置信度统计，PDOP值小于4，单频 B1I水平定位精度优于7 m，高程定位精度优于10 m．在“水平定位精度≤15 m、高程定位精度≤15 m”的条件下，单频定位精度的可用性达到99％以上、连续性整体达到98％以上。