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Occam's Inversion Homepage

"...a heuristic algorithm, lacking theoretical underpinnings, but one that has been found to be remarkably effective in practice"
(Bob Parker in Geophysical Inverse Theory)

Occam is back!

It has been nearly a decade since a new version of OCCAM2DMT was released. Faster smooth inversion codes became available and interest in OCCAM seemed to diminish, and so I was under no pressure to release upgrades. However, until very recently OCCAM was still the only code that could handle bathymetry, thanks to Phil Wannamaker's forward modules, so naturally our group at Scripps (Catherine deGroot-Hedlin, Kerry Key, and David Myer) kept using it, improving it, and making it faster. Of course, computers got much speedier over the years too. Now a simple example I distributed in 1992 which took over 67 hours to do 5 iterations on my desktop runs in less than 5 seconds on my laptop. So here is the latest version, fully open source, with a MATLAB rear end for plotting models, responses, pseudosections and profiles. Now you too can run what Doug Oldenburg once called "the Rolls-Royce of inversion schemes".

Updates:

October, 2009: Occam1DCSEM is now available and contains the most up-to-date changes to the Occam's inversion source code.

Available Implementations:

1D Controlled-source EM (CSEM) and Magnetotelluric (MT) Inversion

2D magnetotelluric (MT) modeling

Catherine's Sharp Boundary 2D MT inversion (f77 version)

 

Last updated: Thursday, 29-Oct-2009 12:22:16 PST
email: kkey@ucsd.edu