利用GPS伪距观测值确定低轨卫星轨道的探讨  

Research on Orbit Determining of Low Earth Orbit Satellites with GPS Pseudo-range Observations

作　　者：张雄[1] 刘峻宁[1] 杨荣华[1] 夏传义[1] 龚俊[1] 

机构地区：[1]武汉大学灾害监测与防治研究中心,武汉大学测绘学院湖北武汉430079

出　　处：《地理空间信息》2005年第3期14-15,18,共3页Geospatial Information

摘　　要：介绍了通过建立卫星的轨道动力学模型,设计出GPS观测方程和运动方程组合的卡尔曼滤波模型。探讨了使用卡尔曼滤波对所得轨道进行滤波平滑,指出了影响精度的因素和提高精度的办法。In this paper, a method of satellite orbit determination is introduced, one that uses pseudorange observations from GPS receiver. By modeling the satel lites orbit, the Kalman filter equation model utilizing GPS measurement and dyna mics models were designed. Using Kalman filter for a smoothed estimate of orbit determination was proposed. At last, some factors of affecting orbit accuracy an d methods of improving orbit accuracy were pointed out.

关 键 词：GPS 伪距观测值 卫星轨道 卡尔曼滤波模型 低轨 动力学模型 运动方程 观测方程 高精度 

分 类 号：P228[天文地球—大地测量学与测量工程] V412.41[天文地球—测绘科学与技术]