星间测距网的抗差估计方法研究

通过分析星间测距网的特殊性,设计了适用于星间测距网的抗差方案。根据失效节点和观测粗差对残差影响的差异,提出分步处理的方法;由于星间测距网中粗差可能较多,为了减少它们对初值的牵连影响,观测值等价权的选择以真误差的估值为依据。通过算例,比较了该方案与其它两种经典抗差估计方案的检测效果,结果表明,该方案在粗差定位的准确性和精度方面都优于其它两种方法。

Study of the robust estimation method of inter-satellite ranging network

A robust scheme fit for inter-satellite ranging netwerk is designed by analyzing the particularity of the inter-satellite ranging network.Based on the difference of the residual influence of the fault points and gross errors of observation,the step-by-step method is put forward.Since there might be many gross errors in inter-satellite network,the equivalent weights of observations are selected based on the estimations of true errors to reduce their embroiled effect on initial values.It is shown from the comparison with the detection results of the other two robust estimation schemes by a computatin example,that the scheme designed is superior to the other two in accuracy and precision of gross errot positioning.