低轨卫星与GPS导航卫星联合定轨研究  

PRECISE ORBIT DETERMINATION OF LOW EARTH ORBIT SATELLITE AND GPS SATELLITE BASED ON COMBINED ORBIT DETERMINATION STRATEGY

作　　者：匡翠林[1] 刘经南[2] 赵齐乐[2] 

机构地区：[1]中南大学测绘与国土信息工程系,长沙410083 [2]武汉大学卫星导航定位研究中心,武汉430079

出　　处：《大地测量与地球动力学》2009年第2期121-125,共5页Journal of Geodesy and Geodynamics

基　　金：863项目(2007AA12Z345);国家自然科学基金青年基金(40504002)

摘　　要：研究利用地面及星载GPS数据同时确定低轨卫星(CHAMP、GRACE)与GPS导航卫星精密轨道的联合定轨方法。针对不同测站数量和分布,设计不同的轨道解算方案,并基于PANDA软件平台进行数值分析。计算结果表明,由于低轨卫星对空间观测几何结构的增强,联合定轨较"两步法"定轨在定轨精度方面有所提高。The combined orbit determination method for low earth orbit satellite and GPS satellite using ground-and space-based GPS tracking data is studied. Some tests were designed according to different number and distribution of ground GPS tracking stations and implemented by use of PANDA （ Positioning And Navigation Data Analysis） software. Numerical results show that better orbit precision with the method can be obtained as compared to ＂two-step orbit determination method＂, because this method profits from the low earth orbit satellite which has greatly enhanced the spatial measurement geometry.

关 键 词：精密定轨 CHAMP GRACE GPS 联合定轨 

分 类 号：P228.1[天文地球—大地测量学与测量工程]