摘要
著名的Helmert方差分量估计公式是基于间接观测平差模型导出的。基于条件观测平差模型导出了方差分量估计公式并给出了实际应用范例,且对两种模型的方差分量估计公式的等价性进行了理论证明。算例表明,文中的估计公式能正确地估计出各类观测值的方差因子。
The famous Helmert formula of variance component estimation was derived based on indirect observational equation.This paper derives the variance component estimation formula based on conditional equation and shows the practical applications,proves the equivalence between the two variance component estimation formulas based on indirect observational and conditional equations.The numerical case shows that our formula can correctly estimate the variance components of different kind of observables.
出处
《测绘工程》
CSCD
2010年第6期28-30,47,共4页
Engineering of Surveying and Mapping
