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GEOREF RECORD

Airborne vertical magnetic gradient for near-surface applications

W. E. Doll, T. J. Gamey, L. P. Beard and D. T. Bell
Airborne vertical magnetic gradient for near-surface applications (in Magnetic gradiometry, Terry McConnell (prefacer) and Bill Dragoset (prefacer))
Leading Edge (Tulsa, OK) (January 2006) 25 (1): 50-53

Abstract

Many specialized applications in near-surface geophysics require greater spatial and amplitude sensitivity than conventional geophysical systems can provide. Recently developed boom-mounted airborne magnetometer and electromagnetic systems are designed to map unexploded ordnance or other small metallic objects over large tracts of government land. These systems operate at altitudes of 1.5-2.0 m to detect ferrous objects with a mass as small as 2 kg. In this low-altitude environment, factors controlling the applicability of a vertical gradient configuration must be reassessed. Our results demonstrate the superiority of measured vertical gradient over calculated gradient (from total field configurations) for data acquired at these low altitudes. We believe the effectiveness is related to reduction of secondary gridding effects associated with several types of positioning errors, and reduction of correlated rotor and compensation noise.


ISSN: 1070-485X
EISSN: 1938-3789
Serial Title: Leading Edge (Tulsa, OK)
Serial Volume: 25
Serial Issue: 1
Title: Airborne vertical magnetic gradient for near-surface applications
Title: Magnetic gradiometry
Author(s): Doll, W. E.Gamey, T. J.Beard, L. P.Bell, D. T.
Author(s): McConnell, Terryprefacer
Author(s): Dragoset, Billprefacer
Affiliation: Battelle, Oak Ridge, TN, United States
Pages: 50-53
Published: 200601
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
Accession Number: 2006-015657
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N43°30'00" - N43°49'60", W102°52'00" - W101°52'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 200608
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