About the Variance-Covariance-Component Estimation

Zhang Baoting. About the Variance-Covariance-Component Estimation[J]. Geomatics and Information Science of Wuhan University, 1982, 7(1): 42-57.

Citation:

Zhang Baoting. About the Variance-Covariance-Component Estimation[J]. Geomatics and Information Science of Wuhan University, 1982, 7(1): 42-57.

Citation:

Zhang Baoting. About the Variance-Covariance-Component Estimation[J]. Geomatics and Information Science of Wuhan University, 1982, 7(1): 42-57.

Abstract

Based upon the least square adjustment of indirect observations a characteristic equation of the variance-covariance-component estimation including a test matrix has been derived.The statistical features of the estimator are discussed in detail.As an example of covariance estimation,some formulas of variance estimation are studied,and their mutual relationships and statistical features are pointed out.Finally,a formula of variance-covariance-component estimation for the adjustment of conditional observation is given.

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