【摘要】 根据卫星动力理论,建立了GPS卫星和低轨卫星的运动模型,再根据GPS定轨定位理论,建立了GPS跟踪数据的观测模型。最后在上述模型的基础上,提出了利用IGS数据产品进行低轨卫星以及地面观测站的GPS跟踪数据仿真的方法,并编制了相应的仿真程序。仿真结果表明文中的仿真方法能达到较高的精度,这对于论证搭载GPS的低轨卫星的定轨方案,评价其精密定轨算法,测试GPS数据处理软件,以及验证和比较GPS数据处理算法都具有较高的应用价值。更多还原

【Abstract】 Based on the satellite dynamic theory,the models for GPS satellite and low earth orbit(LEO) satellite are built.Also based on the theory of orbit determination and positioning,the observable models for GPS tracking data are built.Using these models,a method which simulates GPS observations for LEO satellites and stations on the ground using IGS data products is proposed,and the related programs are implemented.The precise results from our examples indicate that simulation tracking data can be used to investigate orbit determination scheme,evaluate orbit determination methods and test the GPS data processing software,validate and compare the GPS processing algorithms.更多还原