CRE Velocity Inversion

Velocity inversion algorithm using Common Reflection Element (CRE) traveltime approximation.

Designed to Madagascar package

Common Reflection Element (CRE) velocity inversion algorithm is based on Cameron (2008) velocity inversion algorithm and in diffraction focusing migration and simulation. The depth velocity model is obtained from stacked section in two steps: First, simulation and migration of diffraction hyperbolas in the stacked section to obtain the time migration velocity model. Second, time to depth conversion of the time velocity model.

Development setup

• Madagascar package (3.0)

You need to have the actual Madagascar package stable release installed on your computer. Please follow the Installing Madagascar page in the official documentation. You can install Madagascar automatically from Shell Script using program madagainstall from Shellinclude library.

Installation

After Madagascar installing process, you need to install the programs of this repository in your local Madagascar user's directory. You can compile and install it as any other Madagascar program. Usually, Madagascar keeps the path of your local copy source files in the $RSFSRC environment variable. You can show that on a bash terminal using 'echo' command:

~$ echo "$RSFSRC"

And Madagascar will install executable files on your $RSFROOT directory. You can show that environment variable with 'echo' too:

~$ echo "$RSFROOT"

Madagascar stores user programs in $RSFSRC/user directory. So, you can create a new directory or put this repository inside that directory. In this repository, such as every user's repository in Madagascar, we have a compilation SConstruct that compile the C programs. Run 'scons' on your $RSFSRC/user/creGatherInterpolation repository to compile it:

~$ scons

And run 'scons install' in the top directory of your local Madagascar installation (the directory path in your $RSFSRC variable):

~$ sudo scons install

If you have any doubt about this process, please reffer to the Madagascar oficial documentation in Adding_new_programs_to_Madagascar

Usage example

A few motivating and useful examples of how that product can be used. For more examples and details, please refer to the Wiki.

We also have many SConstruct examples in this repository in the experiments directory

Release History and Versions

This package version is referenced in VERSION.md file, and you can see the complete release history in our wiki or in the CHANGELOG.md file.

Meta

main page

Rodolfo Dirack – @dirack – rodolfo_profissional@hotmail.com

Distributed under the GPL3 license. See LICENSE for more information.

Contributing

In order to contribute with this project you should follow the list of steps bellow, please check out "How to contribute with this project?" in our Wiki for more details.

1. Create an issue to your request or choose an issue already defined
2. Fork this project in https://github.com/Dirack/creVelocityInversion/fork
3. Create a branch for your contribution (name it using gitflow)
4. Do clear commit messages (a title with 50 characters and two paragraphs of text)
5. Push your contribution to this repository
6. Create a new Pull Request with a clear description of your contribution

Important: The commit history should be clear, with commit mesages around one or two paraghraps describing your modifications. Pull Requests with unsatisfactory commit history will be rejected.