GOCE卫星厘米级精密定轨

摘要

利用PANDA软件确定GOCE卫星2009年年积日306-332天的简化动力学和几何学轨道,将简化动力学轨道与GOCE精密科学轨道(PSO)以及与基于PANDA解算的几何学轨道比较,简化动力学轨道重复弧段比较,以及利用SLR观测值检核等4种方式对轨道精度进行评估.结果表明,采用该精密定轨策略所确定的GOCE卫星轨道精度与PSO一致,其径向、切向、法向精度均优于2 cm.%The precise reduced dynamic and kinematic orbits for GOCE satellite have been determined with Po sition And Navigation Data Analyst (PANDA) software for period of DOY 306 to 332 of 2009. The orbit accuracy is assessed with the following four methods: the differences between the reduced-dynamic orbits and the Precise Sci ence Orbit (PSO) computed by Astronomical Institute, University of Berne (AIUB) , the differences between the reduced-dynamic orbits and the kinematic orbits, the 6 hours overlap orbit differences between the reduced-dynamic orbits and the external orbit validation with SLR measurements. The results indicate that the accuracy of the re duced-dynamic orbit is about 1 ~ 2 cm in three directions respectively.