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Application of a new 2D time-domain full-waveform inversion scheme to crosshole radar data
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ernst, Jacques Robert Green, Alan G. Maurer, Hansruedi Holliger, Klaus |
| Copyright Year | 2007 |
| Abstract | Crosshole radar tomography is a useful tool in diverse investigations in geology, hydrogeology, and engineering. Conventional tomograms provided by standard ray-based techniques have limited resolution, primarily because only a fraction of the information contained in the radar data i.e., thefirst-arrivaltimesandmaximumfirst-cycleamplitudesis included in the inversion. To increase the resolution of radar tomograms,wehavedevelopedaversatilefull-waveforminversion scheme that is based on a finite-difference time-domain solution of Maxwell’s equations. This scheme largely accountsforthe3Dnatureofradar-wavepropagationandincludes an efficient method for extracting the source wavelet from the radar data.After demonstrating the potential of the newschemeontworealisticsyntheticdatasets,weapplyitto two crosshole field data sets acquired in very different geologic/hydrogeologic environments. These are the first applications of full-waveform tomography to observed crosshole radar data.The resolution of all full-waveform tomograms is showntobemarkedlysuperiortothatoftheassociatedraytomograms. Small subsurface features a fraction of the dominant radar wavelength and boundaries between distinct geological/hydrological units are sharply imaged in the fullwaveformtomograms. |
| File Format | PDF HTM / HTML |
| DOI | 10.1190/1.2761848 |
| Volume Number | 72 |
| Alternate Webpage(s) | http://cgiss.boisestate.edu/pubs/BHRS/Peer-reviewed/Ernst_et_al_2007_Geophysics.pdf |
| Alternate Webpage(s) | https://doi.org/10.1190/1.2761848 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
