Occam 1D Inversion

MT processing makes use of the MTpy library and Occam 1D inversion code. This module applies Occcam 1D inversion to EDI data. Multiple solutions are generated, and a slider is used to view each solution in order to select the appropriate solution. Apparent resistivity and phase versus period are both displayed as graphs. A third graph showing depth versus layer resistivity is also shown.

OCCAM1DCSEM requires three input files: IterationFile, ModelFile, and DataFile (all of which are generated by MTpy automatically). A directory labelled by the mode (see options below) is created as a subdirectory to the input EDI file directory and contains these files. This new directory contains the Occam 1D iteration (.iter) and output response (.resp) files. Full descriptions can be found in here.

Options

References

Kirkby, A.L., Zhang, F., Peacock, J., Hassan, R., Duan, J., 2019. The MTPy software package for magnetotelluric data analysis and visualisation. Journal of Open Source Software, 4(37), 1358. https://doi.org/10.21105/joss.01358

Krieger, L., and Peacock, J., 2014. MTpy: A Python toolbox for magnetotellurics. Computers and Geosciences, 72, p167-175. https://doi.org/10.1016/j.cageo.2014.07.013

Key, K., 2009, 1D inversion of multicomponent, multi-frequency marine CSEM data: Methodology and synthetic studies for resolving thin resistive layers: Geophysics, 74, F9-F20.

Constable, S. C., R. L. Parker, and C. G. Constable, 1987, Occam's inversion - A practical algorithm for generating smooth models from electromagnetic sounding data, Geophysics, 52 (03), 289-300.