1887
Volume 32 Number 1
  • E-ISSN: 1365-2478

Abstract

A

This paper presents a digital linear filter which maps composite resistivity transforms to apparent resistivities for any four—electrode array over a horizontally layered earth. A filter is provided for each of three sampling rates; the choice of filter will depend on resistivity contrasts and computational facilities.

Two methods of filter design are compared. The Wiener‐Hopf least‐squares method is preferable for low sampling rate filters. The Fourier transform method is more successful in producing a filter with a high sampling rate which can handle resistivity contrasts of 100 000: 1.

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2006-04-27
2020-04-09
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