Numerical Modeling of Georadar Data (RADMOD)

Proposers:
Tim Bergmann

Members:
PD Dr. Klaus Holliger (ETH Zürich, Switzerland)

Abstract:

Numerical forward modeling of ground-penetrating radar (GPR) or georadar is instrumental for understanding complex electromagnetic wave phenomena, for defining and solving the inverse problem, and for validating geological interpretaions based on GPR measurements. For the solution of general time-dependent electromagnetic problems, numerical techniques are required. Electromagnetic wave simulation methods with applications to GPR include ray theroy techniques, pseudospectral methods and finite-difference (FD) solutions of Maxwell's equations.

In this project we develop and work with respective FD formulations and consider special problems which are adressed in this project, namely:

• including frequency-dependent constitutive parameters
• absorbing boundary conditions
• anisotropic behaviour
• improving modeling algorithms
• research of respective numerical properties
• antenna radiation patterns
• cylindrical co-ordinates
• borehole modeling
• full waveform modeling of measured GPR sections

The purpose of the project is to provide the most appropriate modeling algorithm in terms of accuracy, CPU and memory demands for a given task.

Duration:
finished

Funding:
University of Hamburg