气候变化领域集成服务门户(CCPortal): Downward Continuation and Transformation of Total-Field Magnetic Anomalies Into Magnetic Gradient Tensors Between Arbitrary Surfaces Using Multilayer Equivalent Sources

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DOI	10.1029/2020GL088678
	Downward Continuation and Transformation of Total-Field Magnetic Anomalies Into Magnetic Gradient Tensors Between Arbitrary Surfaces Using Multilayer Equivalent Sources
	Zuo B.; Hu X.; Leão-Santos M.; Wang L.; Cai Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	The equivalent source method offers a potential means for continuing and manipulating magnetic data between arbitrary surfaces. However, it ultimately suffers from a limited continuation distance and significant errors, which restrict its applicability in practice. To address this problem, we reformulate the equivalent source method with a partial differential equation framework. A multilayer equivalent susceptibility method is innovatively derived based on this approach. The location of equivalent sources is designed for adaptive estimation through the inverse procedure. We introduce nonlinear optimization, regularization, and constraining technologies in inversion to improve the stability and accuracy of the solution. Synthetic, real airborne, and ground data are tested in experiments. The results show that the new method significantly improves the capability and accuracy of the downward continuation and transformation of irregularly located data between arbitrary undulating surfaces. ©2020. The Authors.
英文关键词	Inverse problems; Magnetism; Multilayers; Nonlinear programming; Adaptive estimation; Arbitrary surfaces; Downward continuation; Equivalent source; Equivalent source method; Magnetic gradient tensor; Non-linear optimization; Total field magnetic anomalies; Metadata; accuracy assessment; airborne sensing; error analysis; experimental study; ground-based measurement; innovation; magnetic anomaly; magnetic susceptibility; nonlinearity; optimization
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169921
作者单位	School of Computer Sciences, China University of Geosciences, Wuhan, China; Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; Institute of Science and Technology, Federal University of Goiás, Goiânia, Brazil
推荐引用方式 GB/T 7714	Zuo B.,Hu X.,Leão-Santos M.,et al. Downward Continuation and Transformation of Total-Field Magnetic Anomalies Into Magnetic Gradient Tensors Between Arbitrary Surfaces Using Multilayer Equivalent Sources[J],2020,47(16).
APA	Zuo B.,Hu X.,Leão-Santos M.,Wang L.,&Cai Y..(2020).Downward Continuation and Transformation of Total-Field Magnetic Anomalies Into Magnetic Gradient Tensors Between Arbitrary Surfaces Using Multilayer Equivalent Sources.Geophysical Research Letters,47(16).
MLA	Zuo B.,et al."Downward Continuation and Transformation of Total-Field Magnetic Anomalies Into Magnetic Gradient Tensors Between Arbitrary Surfaces Using Multilayer Equivalent Sources".Geophysical Research Letters 47.16(2020).