Full Waveform Inverse Modeling of Ground Penetrating Radar Data: An Initial Approach.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
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Ground penetrating radar GPR surveys are often interpreted in a qualitative manner to identify anomalies. This method of interpretation is used to determine the existence of a feature when specific properties of the feature are of no interest. However, GPR data can also be interpreted quantitatively to give more definitive depths, geometry, and electromagnetic EM properties of the subsurface materials. Existing analysis procedures do not consider EM wave attenuation, dispersion, scattering, geometric spreading, or interface reflection transmission losses. The aim of this research is to develop interpretation procedures which utilize the full GPR waveform for determining layer thicknesses and the EM properties of subsurface materials. The work consisted of three phases 1 review existing capability for full waveform forward modeling of GPR signals, 2 develop a catalog of theoretical GPR receiver waveforms for representative layered models, and 3 examine the feasibility of developing an inverse modeling procedure to determine physical properties by comparing full waveform forward solutions to measured GPR signatures.
- Geology, Geochemistry and Mineralogy
- Active and Passive Radar Detection and Equipment