基于星间测距的两步滤波时间同步方法

基金项目: 国家自然科学基金资助项目(40604003)

详细信息

Two Steps Time Synchronizing Method for AutoNav with Crosslink Ranging Measurement

¹School of Surveying,Chang'an University,126 Yanta Road,Xi'an 710054,China;²Xi'an Research Institute of Surveying and Mapping,1 Middle Yanta Road,Xi'an 710054,China

Funds: 国家自然科学基金资助项目(40604003)

摘要: 基于星间距离测量的自主定轨对应于不可观测性问题,如果引入一个基准,虽然可保持卫星之间的相对位置关系,但是容易出现星座旋转误差。星座旋转的根本原因在于星间观测(测距和测速)无法反映轨道升交点赤经的系统误差。本文对卫星自主定轨的旋转误差以及控制方法进行了讨论和分析。
- 自主定轨 /
- 时空基准 /
- 星座旋转
Abstract: To maintain the positioning and navigation function of our navigation system,the crosslink ranging measurement is used to calculate the ephemeris and clock error. The simulating method of clock error is presented. A two-step time synchronizing algorithm is introduced. The validation of the algorithm was verified by the simulating data. The results show that the two-step algorithm is slightly better than one-step algorithm.
- crosslink /
- AutoNav /
- time synchronization