APPLICATION OF ADAPTIVE COLLOCATION METHOD TO CRUSTAL DEFORMATION ANALYSIS
Zhao Lihua 1) ; and Zeng Anmin 1,2)
1) School of Geology Engineering and Geomatics，Chang’an University，Xi’an 7100542) Xi’an Information Division of Surveying and Mapping, Xi’ an 710054
Abstract As there are relatively few observed points in crustal deformation monitoring, it is hard to deduct the deformation of the unobserved points correctly with conventional methods. On the basis of the characteristics of the crustal deformation, the collocation method is proposed to be used, with which not only the influence of present random variation of observation points can be taken into account and the variation of the observed points can be found properly but also the deformation information of the unobserved point can be obtained.Futhermore,since the common collocation method is difficult to determine properly the weight proportion between the observation noise and stochastic signal, this paper adopts the adaptive collocation method, that is, modulating the proportion of the stochastic signal and observation noise with an adaptive factor to improve the accuracy of the deduction of the variation of the unobserved points. Finally, a measured crustal deformation monitoring network is calculated and analyzed, and the results prove the effectivity of the proposed method.
Key words ：
collocation
adaptive factor
Helmert variance component estimation
deformation analysis
random signal
Received: 01 January 1900
Corresponding Authors:
Zhao Lihua
Cite this article:
Zhao Lihua ,and Zeng Anmin. APPLICATION OF ADAPTIVE COLLOCATION METHOD TO CRUSTAL DEFORMATION ANALYSIS[J]. , 2009, 29(1): 132-134.
Zhao Lihua ,and Zeng Anmin. APPLICATION OF ADAPTIVE COLLOCATION METHOD TO CRUSTAL DEFORMATION ANALYSIS[J]. jgg, 2009, 29(1): 132-134.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2009/V29/I1/132
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