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This program is available in the Madagascar package! Version 3.0
The Very Fast Simulated Annealing (VFSA) algorithm optimizes the global search of the CRS parameters (RNIP, RN and BETA) throughout fitting the reflection data with the non-hiperbolic common reflection surface (CRS) approximation surface. The algorithm uses the semblance between the CRS approximation surface and the reflection surface in the seismic data as a convergence criterion. The main assumption of this algorithm is that the CRS parameters, RN, RNIP, and BETA that produce the best fit between these surfaces will be the optimized ones.
The program sfvfsacrsnh uses VFSA global optimization to obtain the CRS parameters. This program uses the non-hyperbolic CRS traveltime approximation in the process to fit the data. After CRS parameters inversion, sfnhcrssurf program can be used to build the non-hyperbolic CRS surface that best fits the data for RN, RNIP, and BETA given.
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The vfsa programs are designed for the Madagascar seismic processing package. In order to use them, you should install the actual Madagascar stable version.
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You should also install the vfsa package in your local Madagascar version if it is not already available. So, follow the steps in the Installation section of our README to add the vfsa programs in the current version of your Madagascar package.
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You can also watch this tutorial of "how to install your programs in your local Madagascar version" on Youtube (In Portuguese).