[1]HUANG Jiangpei,DU Jiayun,CAO Ying,et al.The Estimation Method of the Zero Drift of the Relative Gravimeter in High-precision Time-varying Gravity Observation in Yunnan[J].Journal of Seismological Research,2023,46(04):511-520.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0060
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The Estimation Method of the Zero Drift of the Relative Gravimeter in High-precision Time-varying Gravity Observation in Yunnan
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 04
Page number:
511-520
Column:
Public date:
2023-07-15
- Title:
- The Estimation Method of the Zero Drift of the Relative Gravimeter in High-precision Time-varying Gravity Observation in Yunnan
- Keywords:
- drift rate; the Bayesian estimation; mobile-gravity observation; adjustment results; Yunnan
- CLC:
- P315.62
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2023.0060
- Abstract:
- In the time-varying gravity observation network covering hundreds kilometers of land,the nonlinear drift rate of the relative gravimeter and the instrument performance deviation are the main error sources that affect the accuracy of the observational results.In this paper,the drift rates of the mobile-gravity observational data from 1990 to 2022 in Yunnan are calculated respectively with the Bayesian gravity adjustment method and the traditional least squares adjustment method.Then the non-linear dirft rate results from these two methods are compared,and the effectiveness of the Bayesian estimation method in improving the accuracy of gravity adjustment results is systematically evaluated.The results show that the appropriate instrument weight and nonlinear drift rate can be given by the Bayesian optimization method,in order to reduce the error caused by the performance difference of multiple relative gravimeters,and reduce the effective-drift loss caused by the traditional linear drift calculation method.In this way the accuracy of the adjustment results is improved.
- References:
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Last Update:
2023-10-01