P-范极大似然平差及其精度评定

P-norm Distribution Maximum Likelihood Adjustment and Its Precision Evaluation

本文对最小二乘平差、Lp最小平差及P－范极大似然平差进行了分析比较，并按间接平差模型推导了P－范极大似然平差的计算公式。最后给出了平差待估参数与观测值真误差之间的微分关系，由此即可导出平差待估参数的协方差阵。

This paper analyses the adjustment methods of least squares least Lp norm and that of P-norm distribution maximum likelihood and compares the difference between them． Then deduces the calculation formulas according to the indirect adjustment model． At last gives the differential relationships between the unknown parameters and the true errors of the observations． These relationships can be used to evaluate the precision of the estimations．