抗差估计选权迭代分析与比较

Analysis andComparison of the Selecting Weight Iteration Robust Estimation

首先分析了平差过程中观测值误差对所有改正数的影响,介绍了几种经典的等价权函数模型,并分析了各模型的特点,结合实例,以模拟粗差的方式,分析对比了四种等价权模型的抗差效果。结果表明,IGG相对其他方案而言,能较好的抵抗粗差的影响并能够取得理想的抗差效果。

Firstly,the paper analyze the influence of the observation error on the corrections,and introduce several classical equivalence weight function models.And analyze characteristics of each model.Combining with the examples,with the method of simulating the gross error,analyzing and comparing four kinds of equivalence weights.The results show that the IGG scheme have a better effect on resisting gross error and can acquire desirable robustness results with the comparison of other schemes.