| 近地卫星的GPS自主定轨算法研究 |
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| 引用本文： | 宋福香,左文辑.近地卫星的GPS自主定轨算法研究[J].空间科学学报,2000,20(1):40-47. |
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| 作者姓名： | 宋福香 左文辑 |
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| 作者单位： | 中国科学院空间科学与应用研究中心北京100080 |
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| 基金项目： | 863小卫星项目资助课题 |
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| 摘 要： | 为了用ＧＰＳ实现近地卫星的高精度自主定轨，提出了采用序贯ＵＤ协方差分解滤一轨算法。完整地给出了序贯ＵＤ分解算法的计算公式，详细地推导了系统的状态方程和观测方程建立了由９维状态量和８维观测各量组成的导航系统模型，最后作了数字仿真试验，试验结果表明，文中的定轨算法既有较高的精度又便于星上计算机的实现。
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| 关 键 词： | 近地卫星 自主定轨 序贯UD 协方差分解算法 |
| 修稿时间： | 1999年1月5日 |
ALGORITHM STUDY ON AUTONOMOUS ORBIT DETERMINATION FOR LOW EARTH ORBIT MICROSATELLITES USING GPS |
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| SONG Fuxiang,ZUO Wenji.ALGORITHM STUDY ON AUTONOMOUS ORBIT DETERMINATION FOR LOW EARTH ORBIT MICROSATELLITES USING GPS[J].Chinese Journal of Space Science,2000,20(1):40-47. |
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| Authors: | SONG Fuxiang ZUO Wenji |
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| Abstract: | To realize GPS orbit determination for low earth arbit satellites, a navigationalgorithm called sequential UD covariance factorization algorithm is proposed inthis paper. Formulas of UD algorithm are given completely, and state equationsand measurement equations are derived in detail in the paper. Mathematical modelof the navigation system is built, which is composed of nine state vectors and eightobservation vectors. Finally, numerical simulation experiments are conducted. Simulation results indicate that UD algorithm can not only provide high positioningprecision but also be fit for computers onboard low earth orbit satellites. |
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| Keywords: | Autonomous orbit determination Kalman filter Sequential UD covariance factorization algorithm Disturbance function |
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