| More

A MATLAB PROGRAM FOR THE ANALYSIS AND INTERPRETATION OF TRANSIENT ELECTROMAGNETIC SOUNDING DATA

Views: 1134 Downloads: 428
Andreas Tzanis
Andreas Tzanis

Abstract


Herein we present a software system, written in MATLAB, to interpret TEM sounding data. The program, dubbed maTEM, is designed to process, model and invert multiple soundings, either individually, or simultaneously along profiles. The latter capability allows for laterally constrained inversion, so as to generate pseudo-2D or 2D resistivity sections based on the program EM1DINV v2.13 by the Hydro-Geophysics Group of the University of Aarhus, Denmark. Using maTEM, the analyst may import and display data multiple data sets, denoise and smooth the data, perform approximate inversions, design 1-D model(s) graphically, perform forward modelling and inversion and generate/ update data base in which to store the results. Finally, the analyst may use the data base to create 2-D and 3-D displays of the geoelectric structure with built-in graphical functions. maTEM is highly modular so that additional functions can be added at any time, at minimal programming cost. Although the software presented herein is focused on the analysis of TEM data, the maTEM concept has been designed ready to incorporate additional electrical and EM geophysical sounding methods and to mutually constrained analysis of different geophysical data sets.

Keywords


Electromagnetic sounding; TEM; MATLAB; geophysical interpretation;

Full Text:

PDF

References


Anderson, W.L., 1982a. Calculation of transient soundings for a coincident loop system (Program

TCOLOOP). USGS Open-File Report 82-378.

Anderson, W.L., 1982b. Nonlinear least-squares inversion of transient soundings for a coincident loop system

(Program NLSTCO), USGS Open-File Report 82-1064

Anderson, W.L., 1982c. Nonlinear least-squares inversion of transient soundings for a central induction

loop system (Program NLSTCI), USGS Open-File Report 82-1129

Auken E. and Christiansen A.V. 2004. Layered and laterally constrained 2D inversion of resistivity data.

Geophysics 69, 752–761.

XLIII, No 4 – 1951

Auken, E., Christiansen, A.V., Jacobsen, B.H., Foged, N. and Sørensen, K.I., 2005. Piecewise 1D laterally

constrained inversion of resistivity data, Geophysical Prospecting, 53, 497–506.

Barsukov, P.O., Fainberg, E.B. and Khabensky, E.O., 2007. Shallow investigations by TEM-FAST technique:

Methodology and examples, in V.V. Spichak (editor), Methods in Geochemistry and Geophysics,

Volume 40, 56-77.

Christiansen, A. V. and Auken, E., 2004: Optimizing a layered and laterally constrained 2D inversion of

resistivity data using Broyden’s update and 1D derivatives. Journal of Applied Geophysics, 56, 247-

Ingeman-Nielsen, T. and Baumgartner, F. 2006. CR1Dmod: A Matlab program to model 1D complex resistivity

effects in electrical and electromagnetic surveys. Computers & Geosciences, 32, 1411–1419

Karmis, P., 2003. Automated interpretation of transient electromagnetic soundings. Doctoral Dissertation,

N.K University of Athens (in Greek).

Tartaras, E., Zhdanov, M.S. Wada, K. Saito, A. and Hara, T., 2000. Fast Imaging of TDEM data based on

S-inversion. Journal of Applied Geophysics, 43, 15–32.

Wahba, G., 1990. Spline models for observational data. In: CBMS-NSF Regional Conference Series in Applied

Mathematics 59, Soc. Industrial and Applied Mathematics, Philadelphia, Pennsylvania (1990),

p. 169.


Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Andreas Tzanis

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.