ALGORITHM STUDY ON AUTONOMOUS ORBIT DETERMINATION FOR LOW EARTH ORBIT MICROSATELLITES USING GPS
-
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协方差分解滤波算法作为定轨算法.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维状态向量和8维观测向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.
-
关键词:
- 近地卫星 /
- 自主定轨 /
- 序贯UD协方差分解算法 /
- 摄动函数
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.
点击查看大图
计量
- 文章访问数: 1972
- HTML全文浏览量: 63
- PDF下载量: 1506
- 被引次数: 0