A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets

<p>Efficient and accurate acquisition of magnetic field and gradient data have applications over a large range of environmental, archaeological, engineering, and geologic investigations. Developments in new systems and improvements in existing platforms have progressed to the point where magne...

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Autores principales:	M. A. Kass, E. Auken, J. J. Larsen, A. V. Christiansen
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/935f798fbcc445cfb1d6dcccaca00a27
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spelling	oai:doaj.org-article:935f798fbcc445cfb1d6dcccaca00a272021-11-29T07:35:12ZA towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets10.5194/gi-10-313-20212193-08562193-0864https://doaj.org/article/935f798fbcc445cfb1d6dcccaca00a272021-11-01T00:00:00Zhttps://gi.copernicus.org/articles/10/313/2021/gi-10-313-2021.pdfhttps://doaj.org/toc/2193-0856https://doaj.org/toc/2193-0864<p>Efficient and accurate acquisition of magnetic field and gradient data have applications over a large range of environmental, archaeological, engineering, and geologic investigations. Developments in new systems and improvements in existing platforms have progressed to the point where magnetic surveying is a heavily used and trusted technique. However, there is still ample room to improve accuracy and coverage efficiency and to include reliable vector information. We have developed a vector magnetic gradiometer array capable of recording high-resolution field and gradient data over tens of hectares per day at 50 cm sensor spacing. Towed by an all-terrain vehicle, the system consists of eight vertical gradiometer sensor packages and incorporates differential GPS and an inertial measurement system. With a noise floor of around 6 nT at 15 km/h towing speed and 230 Hz sample rates, large areas can be mapped efficiently and precisely. Data are processed using a straightforward workflow, using both standard and newly developed methodologies. The system described here has been used successfully in Denmark to efficiently map buried structures and objects. We give two examples from such applications highlighting the system's capabilities in archaeological and geological applications.</p>M. A. KassE. AukenE. AukenJ. J. LarsenA. V. ChristiansenCopernicus PublicationsarticleGeophysics. Cosmic physicsQC801-809ENGeoscientific Instrumentation, Methods and Data Systems, Vol 10, Pp 313-323 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geophysics. Cosmic physics QC801-809
spellingShingle	Geophysics. Cosmic physics QC801-809 M. A. Kass E. Auken E. Auken J. J. Larsen A. V. Christiansen A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
description	<p>Efficient and accurate acquisition of magnetic field and gradient data have applications over a large range of environmental, archaeological, engineering, and geologic investigations. Developments in new systems and improvements in existing platforms have progressed to the point where magnetic surveying is a heavily used and trusted technique. However, there is still ample room to improve accuracy and coverage efficiency and to include reliable vector information. We have developed a vector magnetic gradiometer array capable of recording high-resolution field and gradient data over tens of hectares per day at 50 cm sensor spacing. Towed by an all-terrain vehicle, the system consists of eight vertical gradiometer sensor packages and incorporates differential GPS and an inertial measurement system. With a noise floor of around 6 nT at 15 km/h towing speed and 230 Hz sample rates, large areas can be mapped efficiently and precisely. Data are processed using a straightforward workflow, using both standard and newly developed methodologies. The system described here has been used successfully in Denmark to efficiently map buried structures and objects. We give two examples from such applications highlighting the system's capabilities in archaeological and geological applications.</p>
format	article
author	M. A. Kass E. Auken E. Auken J. J. Larsen A. V. Christiansen
author_facet	M. A. Kass E. Auken E. Auken J. J. Larsen A. V. Christiansen
author_sort	M. A. Kass
title	A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
title_short	A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
title_full	A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
title_fullStr	A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
title_full_unstemmed	A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
title_sort	towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/935f798fbcc445cfb1d6dcccaca00a27
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A towed magnetic gradiometer array for rapid, detailed imaging of utility, geological, and archaeological targets

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