1887
Volume 59 Number 1
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The enhancement of potential field data using filters based on horizontal and vertical derivatives is common. As well as the direct use of the gradients themselves they are used in filters such as sunshading, total horizontal derivative, analytic signal, horizontal and vertical tilt angles, the Theta map and other filters. These techniques are high‐pass filters of different types and so enhance noise as well as detail in the data. A new derivative operator is introduced in this paper, which generalizes the effects of some of the previously mentioned filters. This filter is a linear combination of the horizontal and vertical field derivatives, normalized by the analytic signal amplitude. The filter is demonstrated on aeromagnetic and gravity data from South Africa.

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/content/journals/10.1111/j.1365-2478.2010.00901.x
2010-12-13
2024-03-29
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References

  1. BlakelyR.J.1995. Potential Theory in Gravity and Magnetic Applications . Cambridge University Press.
    [Google Scholar]
  2. CooperG.R.J.2009. Balancing images of potential field data. Geophysics74, L17–L20.
    [Google Scholar]
  3. CooperG.R.J. and CowanD.R.2006. Enhancing potential field data using filters based on the local phase. Computers & Geosciences32, 1585–1591.
    [Google Scholar]
  4. HornB.K.P.1982. Hill shading and the reflectance map. Geo-Processing2, 65–146.
    [Google Scholar]
  5. LiX.2006. On ‘Theta map: Edge detection in magnetic data’ ( C.Wijns , C.Perez and P.Kowalczyk 2005). Geophysics71, X11–X12.
    [Google Scholar]
  6. MillerH.G. and SinghV.1994. Potential field tilt – a new concept for location of potential field sources. Journal of Applied Geophysics32, 213–217.
    [Google Scholar]
  7. MitasovaH. and HofierkaJ.1993. Interpolation by regularized spline with tension: II. Application to terrain modeling and surface geometry analysis. Mathematical Geology25, 657–669.
    [Google Scholar]
  8. WijnsC., PerezC. and KowalczykP.2005. Theta map: Edge detection in magnetic data. Geophysics70, 39–43.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): Generalized derivative operator; Sunshading; Theta map

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