利用单频GPS/Galileo组合观测值的导航性能分析  

Navigation performance analysis using combined single-frequency GPS/Galileo observations

作　　者：罗小敏[1] 蔡昌盛[1] 潘林[1] 戴吾蛟[1] 匡翠林[1] 

机构地区：[1]中南大学测绘与遥感科学系,湖南长沙410083

出　　处：《测绘工程》2014年第9期21-25,31,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41004011);中南大学研究生自主探索创新项目(2013zzts246)

摘　　要：针对不同观测值的初始方差比值,对比GPS/Galileo组合单点定位的结果。利用不同测站的观测数据和广播星历数据进行单频GPS/Galileo组合单点定位试验。结果表明,组合GPS/Galileo单点定位的平面方向精度优于2m,高程方向精度优于4m,点位精度优于5m;相比于GPS单系统,GPS/Galileo组合系统在平面方向的定位精度略有提高,高程方向的定位精度改善率为11%。同时给出基于4颗IOV卫星的Galileo单点定位结果。The results of combined GPS/Galileo single point positioning are compared with different observation initial variance ratios. The combined single-frequency GPS/Galileo single point positioning is tested by use of observations and broadcast ephemeris data from different stations. The results indicate that the accuracy is better than 2m and 4m for the horizontal direction and vertical direction, respectively. The positional accuracy is better than 5m of combined GPS/Galileo single point positioning. Compared with GPS-only system,the accuracy of combined GPS/Galileo system is not significantly improved in the horizontal direction. However, The improvement rate is 11% of positioning accuracy in vertical direction. The results of Galileo single point positioning based on four IOV satellites is also showed.

关 键 词：GPS GPS/Galileo 单频 单点定位 精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]