基于测速定轨的轨道参数精度分析

利用误差传播关系,比较了测速体制下逐点定轨算法和多项式定轨算法的精度,为多项式和样条算法在测速定轨体制中的应用提供理论依据。利用逐点及多项式算法对两条典型轨道进行性能计算,结果表明:多项式算法能获得比逐点算法更高精度的轨道参数,且该算法数据结构简单、具有一定的实时性。

Analysis of Orbit Parameter Accuracy by use of Rate Data

With the development of radar and tracking technologies,the mode of orbit tracking and telemetry control system is evolving towards a new type of using only six or more velocity-measuring radars.As a result,it is necessary to study problems such as data processing in the new system,and the priority of various algorithms in this new system.Error propagation theory was used to compare the accuracy of point by point algorithm and that of the polynomial algorithm so as to provide theorefical supporting for the use of polynomial and spline algorithm in the new system.Computer simulations by using the two algorithms for two typical orbits were presented.It showed that the polynomial algorithm can get much higher accuracy than the point by point algorithm,besides,data structure of the polynomial algorithm was simple and suitable for real-time computation.