A Stable and High-Precision Downward Continuation Method of Magnetic Data

Downward continuation is an effective technique that can be used to transform the magnetic data measured on one surface to the data that would be measured on another arbitrary lower surface. However, it suffers from amplitude attenuation and is susceptible to noise, especially when the continuation...

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Autores principales:	Zhiwen Zhou, Jun Wang, Xiaohong Meng, Yuan Fang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	constrained downward continuation equivalent source Tikhonov regularization magnetic data Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/fded1e831fbc42d59e8b98b9ed75f2aa
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spelling	oai:doaj.org-article:fded1e831fbc42d59e8b98b9ed75f2aa2021-11-25T16:39:48ZA Stable and High-Precision Downward Continuation Method of Magnetic Data10.3390/app1122108812076-3417https://doaj.org/article/fded1e831fbc42d59e8b98b9ed75f2aa2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10881https://doaj.org/toc/2076-3417Downward continuation is an effective technique that can be used to transform the magnetic data measured on one surface to the data that would be measured on another arbitrary lower surface. However, it suffers from amplitude attenuation and is susceptible to noise, especially when the continuation distance is large. To solve these problems, we present a stable and high-precision downward continuation method combining the ideas of equivalent source technique, Tikhonov regularization, radial logarithmic power spectrum analysis, and constrained strategy. To implement this method, the observed data is used to construct the equivalent source in the study area, and the small amount of measured magnetic data at the lower surface (relative to the original observation surface) is employed to constrain the calculation procedure simultaneously. Then the magnetic data at the target surface can be obtained by using a forward calculation procedure instead of the risky downward continuation procedure. The proposed method is tested on both synthetic model data and real magnetic data collected in the South China sea. Various obtained results demonstrate that the method reported in this study has higher accuracy and better noise resistance than the traditional downward continuation methods.Zhiwen ZhouJun WangXiaohong MengYuan FangMDPI AGarticleconstrained downward continuationequivalent sourceTikhonov regularizationmagnetic dataTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10881, p 10881 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	constrained downward continuation equivalent source Tikhonov regularization magnetic data Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	constrained downward continuation equivalent source Tikhonov regularization magnetic data Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Zhiwen Zhou Jun Wang Xiaohong Meng Yuan Fang A Stable and High-Precision Downward Continuation Method of Magnetic Data
description	Downward continuation is an effective technique that can be used to transform the magnetic data measured on one surface to the data that would be measured on another arbitrary lower surface. However, it suffers from amplitude attenuation and is susceptible to noise, especially when the continuation distance is large. To solve these problems, we present a stable and high-precision downward continuation method combining the ideas of equivalent source technique, Tikhonov regularization, radial logarithmic power spectrum analysis, and constrained strategy. To implement this method, the observed data is used to construct the equivalent source in the study area, and the small amount of measured magnetic data at the lower surface (relative to the original observation surface) is employed to constrain the calculation procedure simultaneously. Then the magnetic data at the target surface can be obtained by using a forward calculation procedure instead of the risky downward continuation procedure. The proposed method is tested on both synthetic model data and real magnetic data collected in the South China sea. Various obtained results demonstrate that the method reported in this study has higher accuracy and better noise resistance than the traditional downward continuation methods.
format	article
author	Zhiwen Zhou Jun Wang Xiaohong Meng Yuan Fang
author_facet	Zhiwen Zhou Jun Wang Xiaohong Meng Yuan Fang
author_sort	Zhiwen Zhou
title	A Stable and High-Precision Downward Continuation Method of Magnetic Data
title_short	A Stable and High-Precision Downward Continuation Method of Magnetic Data
title_full	A Stable and High-Precision Downward Continuation Method of Magnetic Data
title_fullStr	A Stable and High-Precision Downward Continuation Method of Magnetic Data
title_full_unstemmed	A Stable and High-Precision Downward Continuation Method of Magnetic Data
title_sort	stable and high-precision downward continuation method of magnetic data
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fded1e831fbc42d59e8b98b9ed75f2aa
work_keys_str_mv	AT zhiwenzhou astableandhighprecisiondownwardcontinuationmethodofmagneticdata AT junwang astableandhighprecisiondownwardcontinuationmethodofmagneticdata AT xiaohongmeng astableandhighprecisiondownwardcontinuationmethodofmagneticdata AT yuanfang astableandhighprecisiondownwardcontinuationmethodofmagneticdata AT zhiwenzhou stableandhighprecisiondownwardcontinuationmethodofmagneticdata AT junwang stableandhighprecisiondownwardcontinuationmethodofmagneticdata AT xiaohongmeng stableandhighprecisiondownwardcontinuationmethodofmagneticdata AT yuanfang stableandhighprecisiondownwardcontinuationmethodofmagneticdata
_version_	1718413115422408704

A Stable and High-Precision Downward Continuation Method of Magnetic Data

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