多测速系统测速差分计算及误差分析

Difference algorithms and error analysis of velocity data from multi-velocity measurement system

多测速系统是航天测控网的重要组成部分,通过多站联测可实现外空间飞行目标的高精度测速。以四站联测距离和变化率为对象,建立了测速系统测量数据的两组差分算法和误差传播算子及精度计算公式。任务实测数据计算结果表明,该方法可有效消除跟踪测量过程距离和变化率数据的大部分误差,提高数据处理精度。

The high accuracy velocity measurement system is an important part in the TTC nets,which can be jointly used to determine velocity of spacecraft in space.Aiming at four station distance and its ratios,two kinds of difference algorithms of velocity data from multi-velocity measurement system as well as the error transmission formula and precision estimators are built in this paper.Practical computation results show that these new approaches are able to eliminate a large part of measurement error in the tracking process distance and its changing ratios and to improve precision of data processing.