距离变化率测量慢漂误差的估计

THE ESTIMATION OF DRIFT ERROR IN RANGE RATE MEASUREMENT

ＭＩＳＴＲＡＭ系统是一种常用的航天飞行器轨道跟踪测量设备，但在距离变化率跟踪测量中存在慢漂误差，该误差严重影响测量数据精度。本文利用样条函数，建立了估计慢漂误差和轨道参数的非线性模型；通过建模、选模准则的深入研究，给出了表示轨道参数和表示慢漂误差的样条函数的节点选取原则；最后，利用所得的最优模型，给出了慢漂误差的估计及估计精度。本文方法应用于运载火箭的跟踪数据处理，得到了与工程分析非常吻合的结果。

Continuous Wave Radar is a conventional tracking system of aircraft and there exists a kind of drift error in range rate measurement,which seriously affects the accuracy of observed data In this paper,we build the nonlinear model by use of spline function,which is used to estimate drift error and arbit parameter Furthermore,we give a criterion of selection spline node which is applied in the spline express of both orbit and drift error At last,we give estimation of drift error and its estimation accuracy We apply the method to the processing of practical observation data and obtain the satisfying results