Estimations of Variances of the observables for the Adjustment Models with Systematic Parameters
Date Issued
2005
Date
2005
Author(s)
Chang, Ya-Ling
DOI
zh-TW
Abstract
The techniques of the estimations of variance-covariance components used to be based on the assumption that there remained no systematic errors in the observations. This research brings forth the estimations of the variance-covariance components for the observation equations with systematic parameters. The proposed technique enables a more appropriate weight matrix to be formed for the network and hence more proper estimates for the unknown parameters, systematic and nonsystematic as well.
The experiments indicated that there were systematic errors remained in the three leveling lines of the First-Order class I leveling network of Taiwan (2001), and that the effects due to the systematic errors on the elevations and their precisions were eliminated by adding correspondingly three systematic parameters to the three lines of the Taiwan network.
Subjects
系統參數
方差與協方差估計
systematic parameters
estimation of variance-covariance components
Type
thesis
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