摘要
基于单脉冲星的动力学定轨,在X射线脉冲星导航技术尚不成熟时具有较强的实用价值。将X射线脉冲星观测方程与航天器动力学模型相结合,系统研究了利用X射线脉冲星观测量进行单星动力学定轨的方法原理。利用仿真数据量化分析了各项因素对定轨精度的影响,指出X射线脉冲星方向单位向量越靠近航天器轨道面单星定轨位置精度越差。因此提出了单探测器轮流观测多颗脉冲星的准多星定轨方法,从而使定轨精度由km量级提高到了20 m。
Single X-ray pulsar dynamic orbit determination is very useful when X-ray pulsar navigation technology is juvenility.X-ray pulsar observation equation and spacecraft dynamic model were combined together.The principles of single pulsar dynamic orbit determination using X-ray pulsar observations were analysed systematically.Quantification analyses were carried out aimed to study the influence of all kinds of error on orbit determination using simulated data.Results indicated that more closer the unit vector of X-ray pulsar direction to spacecraft orbit more worse the position precision of orbit determination.So semi-multiple X-ray pulasr orbit determination method was presented.It can improve the orbit determination precision from kilometer grade to twenty meter.
出处
《测绘科学技术学报》
北大核心
2010年第4期251-254,共4页
Journal of Geomatics Science and Technology
基金
国家自然科学基金资助项目(40604003)
