The effect of ramp function turn-off on the TEM response of layered earth

A. P. Raiche

doi:10.1071/EG984037

ISSN: 0812-3985
E-ISSN: 1834-7533

The effect of ramp function turn-off on the TEM response of layered earth
Authors A. P. Raiche^a
View Affiliations Hide Affiliations

^a CSIRO Division of Mineral Physics, PO Box 136 North Ryde, NSW, 2113, Australia
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 15, Issue 1, Mar 1984, p. 37 - 41
DOI: https://doi.org/10.1071/EG984037
- Published online: 01 Mar 1984

Abstract

Formulae for the transient electromagnetic response of a layered half-space for ramp function current turn-offs are derived for coincident loop, vertical dipole and horizontal dipole receiver configurations. For the case of a uniform half-space, these take the form of an easily summed series. The errors involved in assuming the ramp function to be a step function are illustrated for four different earth models. An apparent resistivity algorithm for the coincident loop configuration is also presented.

Article metrics loading...

/content/journals/10.1071/EG984037

1984-03-01

2026-01-23

From This Site

/content/journals/10.1071/EG984037

dcterms_title,dcterms_subject,pub_keyword

-contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution

10

5

Full text loading...

References

Knight, J. H. & Raiche, A. P. (1982), ‘Transient electromagnetic calculations using the Gaver - Stehfest inverse Laplace transform method’. Geophysics 47, 47-50.
Lee, T. & Lewis, R. G. (1974), Transient response of a large loop on a layered ground’, Geophys. Prosp. 22, 430-44.
Raiche, A. P. & Spies, B. R. (1981), ‘Coincident loop transient electromagnetic master curves for interpretation of two-layered earths’. Geophysics 46, 53-64.
Spies, B. R. & Raiche, A. P. (1980), ‘Calculation of apparent conductivity for the transient electromagnetic (coincident loop) method using an HP-67 calculator’. Geophysics 45, 1197-1204.
Ward, S. H. (1967), ‘Electromagnetic theory for geophysical applications’, in Mining Geophysics, Vol. II, Theory, pp. 10-197. Society of Exploration Geophysicists, Tulsa.

/content/journals/10.1071/EG984037

Article Type: Research Article

Keyword(s): current turn-off; ramp function; transient EM

Most Cited This Month Most Cited RSS feed

- A comparison of smooth and blocky inversion methods in 2D electrical imaging surveys
  
  Authors M.H. Loke, Ian Acworth and Torleif Dahlin
- Reverse-Time Migration using the Poynting Vector
  
  Authors Kwangjin Yoon and Kurt J. Marfurt
- SkyTEM–a New High-resolution Helicopter Transient Electromagnetic System
  
  Authors K. I. Sorensen and Esben Auken
- An overview of a highly versatile forward and stable inverse algorithm for airborne, ground-based and borehole electromagnetic and electric data
  
  Authors Esben Auken, Anders Vest Christiansen, Casper Kirkegaard, Gianluca Fiandaca, Cyril Schamper, Ahmad Ali Behroozmand, Andrew Binley, Emil Nielsen, Flemming Effersø, Niels Bøie Christensen, Kurt Sørensen, Nikolaj Foged and Giulio Vignoli
- The Fast Marching Method: An Effective Tool for Tomographic Imaging and Tracking Multiple Phases in Complex Layered Media
  
  Authors Nicholas Rawlinson and Malcolm Sambridge
- 3-D Analytic Signal in the Interpretation of Total Magnetic Field Data at Low Magnetic Latitudes
  
  Authors Ian N. MacLeod, Keith Jones and Ting Fan Dai
- CMP cross-correlation analysis of multi-channel surface-wave data
  
  Authors Koichi Hayashi and Haruhiko Suzuki
- A new direct non-invasive groundwater detection technology for Australia
  
  Authors M. Schirov, A. Legchenko and G. Creer
- 3D inversion of airborne electromagnetic data using a moving footprint
  
  Authors Leif H. Cox, Glenn A. Wilson and Michael S. Zhdanov
- Notes On Rock Magnetization Characteristics In Applied Geophysical Studies
  
  Authors D. A. Clark and J. B. Emerson
More Less

The effect of ramp function turn-off on the TEM response of layered earth

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed