卫星时表误差(Ephemeris Error)即使卫星是非常的精密复杂，它可以计算出一些极微小的讯息信息，如原子钟(Cesium)即是如此一个精准的装置，但是精准并不代表完美...
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satellite ephemeris error 卫星星历误差
We can calculate the URE which is caused by broadcasting ephemeris error by comparing the observation with the distance which is calculated by the observation station coordinate and satellite coordinate.
观测量评估广播星历精度,实际上就是比较观测量与根据广播星历计算的卫星位置和地面站的位置计算的星地距离,即由广播星历误差引起的用户距离误差(URE)。
参考来源 - GPS广播星历及其精度评估研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Ephemeris error is one of the most important factors which affect positioning precision when satellite navigation was used.
广播星历误差是影响卫星导航用户定位精度的重要因素之一。
This paper analyzed the characters and rule of the satellite ephemeris error. It proposes the Model of the diagnosis and Forecast for the GPS broadcasting ephemeris error.
分析了GPS卫星星历误差的影响特征与规律，提出了广播星历误差影响诊断与预测模型。
The results show that these methods are adapted well to all types of navigation satellite, and the error of the fitting ephemeris is less than several centimeters, even several millimeters.
结果表明，改进后的拟合方法能适用于各种类型的导航卫星轨道，拟合精度在厘米级或者毫米级。
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