科研之友
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摘要
The attitude changes of the bird can influence both the direction and position of the magnetic dipole which may introduce errors into helicopter electromagnetic (EM) data. The traditional attitude correction methods using a superposed dipole model only consider the change of direction but ignore the position variation, so limit correction effects. We employ five models with different electrical parameters and calculated the EM response ratios before and after attitude change. We further propose a new attitude correction method which takes both the changes of direction and position before and after attitude change into account. We deduce an approximately constant relationship between the EM response ratio of the total attitude effect and the product of the EM response ratios when the direction effect and position changes separately. In order to test the new total attitude correction method, this paper employ five sets of synthetic data for correction using the superposed dipole correction method and our scheme, respectively. The comparison indicates that the total attitude correction method suggested in this paper is able to generate a better correction result than the superposed dipole method.
- 出版日期2014-4
- 单位吉林大学
