Abstract
A MATLAB program was developed to invert first arrival travel time picks from zero offset profiling borehole ground penetrating radar traces to obtain the electromagnetic wave propagation velocities in soil. Zero-offset profiling refers to a mode of operation wherein the centers of the bistatic antennae being lowered to the same depth below ground for each measurement. The inversion uses a simulated annealing optimization routine, whereby the model attempts to reduce the root mean square error between the measured and modeled travel time by perturbing the velocity in a ray tracing routine. Measurement uncertainty is incorporated through the presentation of the ensemble mean and standard deviation from the results of a Monte Carlo simulation. The program features a pre-processor to modify or delete travel time information from the profile before inversion and post-processing through presentation of the ensemble statistics of the water contents inferred from the velocity profile. The program includes a novel application of a graphical user interface to animate the velocity fitting routine.
Original language | English (US) |
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Pages (from-to) | 767-776 |
Number of pages | 10 |
Journal | Computers and Geosciences |
Volume | 30 |
Issue number | 7 |
DOIs | |
State | Published - Aug 2004 |
Keywords
- Graphical user interface
- Monte Carlo
- Optimization
- Simulated annealing
- Uncertainty
ASJC Scopus subject areas
- Information Systems
- Computers in Earth Sciences