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oa Levelling aeromagnetic survey data without the need for tie‐lines
- Source: Geophysical Prospecting, Volume 63, Issue 2, Feb 2015, p. 451 - 460
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- 01 Dec 2013
- 01 Jul 2014
- 27 Nov 2014
Abstract
ABSTRACT
A new methodology that levels airborne magnetic data without orthogonal tie‐lines is presented in this study. The technique utilizes the low‐wavenumber content of the flight‐line data to construct a smooth representation of the regional field at a scale appropriate to the line lengths of the survey. Levelling errors are then calculated between the raw flight‐line data and the derived regional field through a least squares approach. Minimizing the magnitude of the error, with a first‐degree error function, results in significant improvements to the unlevelled data. The technique is tested and demonstrated using three recent airborne surveys.
Copyright © 2015 European Association of Geoscientists & Engineers © 2014 British Geological Survey © NERC. Geophysical Prospecting published by John Wiley & Sons Ltd. on behalf of European Association of Geoscientists & Engineers.