大地测量与地球动力学2012，Vol.32Issue(2)：47-50,4.
IGS站的几何结构与数量对GPS导航星座精密轨道确定的影响分析
INFLUENCE OF GEOMETRY AND NUMBER OF IGS STATION ON PRECISE ORBIT DETERMINATION OF GPS NAVIGATION CONSTELLATION
摘要
Abstract
One-day, three-day and seven-day orbit solutions of GPS navigation constellation based on the ob-servations of IGS stations in different numbers and geometries from 87-day to 95-day in 2008 were determined. The final solutions were compared with IGS precise ephemeris. The result shows that the accuracy of one-day, three-day and seven-day orbit solutions could reach up to 4. 9 cm, 3. 6 cm and 3. 4 cm when optimal geometry of the 40 IGS stations are selected. With the increase of IGS stations, the orbit accuracy could not be remarkably improved when the IGS stations have reached a certain limit, but computing time become longer. Thus it is evident that the geome-try is the key factor which affects the accuracy of the final solution when the number of IGS stations is fixed.关键词
GPS/导航星座/精密轨道/几何结构/IGS站Key words
GPS/ navigation constellation/precise orbit/geometry/IGS station分类
天文与地球科学引用本文复制引用
肖长伟,袁运斌,盛传贞,王永乾,董丽娜..IGS站的几何结构与数量对GPS导航星座精密轨道确定的影响分析[J].大地测量与地球动力学,2012,32(2):47-50,4.基金项目
国家自然科学基金(41021003,40890160,40625013) （41021003,40890160,40625013）
