PSSFWI-1 Pre-stack Seismic full waveform inversion (2D and 3D)
 

This program simulates seismic wave propagation . It solves acoustic or full-acoustic or elastic wave equation. Output is synthetic seismograms . The parameters are p-wave velocities for Acoustic wave equation p-wave velocities, densities for the Full Acoustic wave equation and p-wave velocities, s-wave velocities, densities for the Elastic wave equation . The equations are solved in time domain by using finite difference method which employs second or fourth order derivatives. The Neumann Boundary condition and/or transparent boundary condition provide the solutions at the edges.

Please see the figure for the 3D example (Acoustic wave equation)

The velocity model sought is obtained by means of full waveform inversion. Current version inverts P-wave velocity only. Uses of derivative-based methods;-weighted least squares method, conjugate gradient method, it uses parallel processing to speed up the process. . A stand-alone user friendly interface transmits the inputs to program.

Please see the figure for sample 2D test ; ÇOMÜ velocity model(my university) example...

DCRFDM-1 DC resistivity finite difference modelling (2D and 3D)
 

This modelling tool is developed for DC resistivity methods. the output is apparent resistivities for pre-defined electrode configuration. the program solves Poisson equations using second order Finite Difference method in Cartesian coordinates. Conductivities of each cube/block are taken as parameter. It uses Neumann and/or drichlet boundary conditions at the edges. An user friendly interface provide the communication with software.

Please see the figure for the 3D example. This is voltage distribution caused by injecting current to soil.

inversion being tested.

GPRFDTDM-1 Ground Penetrating Radar Finite Difference Time Domain Modelling (2D and 3D)
 

This software is to simulate ground penetrating radar. A high-frequency electromagnetic wave propagation is considered. the output is synthetic radargrams. It solves Maxwell's and Helmholtz equations in Time Domain. The equations are solved using second and fourth order Finite Difference method in Cartesian coordinates. dielectric permittivity, magnetic susceptibility and conductivity of each cell/block are the parameter. It uses Transparent and/or drichlet boundary conditions at the edges. A user friendly interface makes it easy tool.

Please see the figure for the 1D example(Maxwell equation).

inversion being tested.

GBM-1 Gravity Block Modeling (2D)
 

This software is developed for Gravity method. It uses Cartesian coordinates. Density or density difference of each cell/block construct the model. It also has a user friendly interface.

Please see the figure for the 2D example.

inversion being tested.

MBM-1 Magnetic Block Modelling (2D)
 

This software is developed for Magnetic method. It uses Cartesian coordinates. Magnetization intensity or difference of magnetization intensity of each cell/block construct the model. It also has a user friendly interface.

Please see the figure for the 2D example.

inversion being tested.