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| 引用本文： | 李伟伟,沈云中. ����ƹ�ģ�ͷ���������Ƶ�һ���·���[J]. 大地测量与地球动力学, 2010, 30(6): 57-59 |
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| 作者姓名： | 李伟伟 沈云中 |
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| 作者单位： | 1. 同济大学测量与国土信息工程系,上海,200092
2. 同济大学测量与国土信息工程系,上海,200092;国家测绘局现代工程测量重点实验室,上海,200092 |
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| 摘 要： | ????????????????????????????????????????Helmert???????????????????????????????????в???????????????????????????????????????????????????????÷????????????????????????????????????????????????????????
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| 关 键 词： | ?????? ?????? Helmert??????????? ???????? ??????? |
A NEW VARIANCE COMPONENT ESTIMATION METHOD USED FOR COLLOCATION |
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| Li Weiwei,Shen Yunzhong. A NEW VARIANCE COMPONENT ESTIMATION METHOD USED FOR COLLOCATION[J]. Journal of Geodesy and Geodynamics, 2010, 30(6): 57-59 |
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| Authors: | Li Weiwei Shen Yunzhong |
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| Affiliation: | 1)Department of Surveying and Geo-informatics, Tongji University, Shanghai 2000922Key Lab. of Advanced Surveying Engineering of State Bureau of Surveying and Mapping, Shanghai 200092 |
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| Abstract: | For the collocation model, the quasi observation equation usually is introduced to signals, and then the variance components for both observation errors and signals estimates are computed by use of the Helmert equation. A new formula to estimate the variance components for collocation model is derived based on the quadratic forms of residuals and signals. The numerical example indicates that the new method can get the same results as that based on quasi observation equation, thus the method is proved to be true. |
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| Keywords: | collocation quadratic form Helmert variance component estimation variance factor quasi observation |
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