| MN长度误差及方向偏差对EH4视电阻率的影响 |
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| 引用本文： | 罗安华,李文尧.MN长度误差及方向偏差对EH4视电阻率的影响[J].物探化探计算技术,2012,34(4):397-401. |
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| 作者姓名： | 罗安华 李文尧 |
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| 作者单位： | 昆明理工大学国土资源工程学院,昆明,650093 |
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| 摘 要： | 在EH4工作中,MN误差会导致视电阻率误差。有学者曾推导出MN长度误差引起的视电阻率相对误差公式,但公式的推导过程与实际工作有一定的偏差。MN方向偏差、MN长度误差及方向偏差同时存在对EH4视电阻率的影响,却未见报道。因此,这里对MN长度误差、MN方向偏差、MN长度误差及方向偏差同时存在引起的EH4视电阻率相对误差进行理论推导和数值计算。研究表明,EH4视电阻率误差随着MN误差的增大而增大;当存在MN长度误差时,MN长度误差为负的视电阻率相对误差比MN长度误差为正时大。
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| 关 键 词： | EH4 高频大地电磁法 视电阻率误差 MN长度误差 MN方向偏差 |
EFFECTS OF MN ERROR IN LENGTH AND DEVIATION IN DIRECTION ON APPARENT RESISTIVITY IN EH4 |
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| LUO An-hua,LI Wen-yao.EFFECTS OF MN ERROR IN LENGTH AND DEVIATION IN DIRECTION ON APPARENT RESISTIVITY IN EH4[J].Computing Techniques For Geophysical and Geochemical Exploration,2012,34(4):397-401. |
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| Authors: | LUO An-hua LI Wen-yao |
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| Institution: | (Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China) |
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| Abstract: | In EH4 work,MN error can cause the apparent resistivity error.Some scholars had deduced the apparent resistivity relative error formula caused by MN error in length.There is a larger deviation between deducting process of the formula and actual work.The influence of EH4 apparent resistivity caused by MN deviation in direction and by both MN error in length and deviation in direction has not been reported.Therefore,this paper adopts theoretical derivation and numeric calculation to study the EH4 apparent resistivity relative error caused by MN error in length,MN deviation in direction and both of them.The research indicates that the EH4 apparent resistivity error increases with MN error;When MN error in length exists,the apparent resistivity relative error caused by negative MN error in length is larger than positive MN error in length caused. |
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| Keywords: | EH4 high-frequency electromagnetic sounding apparent resistivity error MN error in length MN deviation in direction |
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