翔实介绍了一种导航卫星精密定轨基本算法。在开源代码基础上，实现了非差载波相位观测方程的解算和扩展卡尔曼滤波器以及其他一些与定轨相关的精密改正。应用区域跟踪站数据计算得到了导航卫星位置，与IGS的综合精密星历相比较，其三维均方差略大于5cm，这个结果可以满足区域非差分用户的精密位置服务需求。%It’ s presented in detail that a basic kind of algorithm is used in navigation satellite orbit determination. Based on open source codes,the software is developed to calculate the observations of non-differential carrier phase,to estimate parameters using extended kalman filter and other precise corrections associated with the orbit determination. And the satellite position is calculated, using the data of regional continuously operating reference stations.Compared with IGS final orbit,the estimated satellite position 3D RMS error is slightly larger than 5cm.This result can meet the needs of regional non-differential users in precise location services.
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