Geophysical imaging with backpropagation and zeroth-order phase approximation
- Oak Ridge National Laboratory, TN (USA)
- Fitzsimons Army Medical Center, Aurora, CO (USA)
A promising technique for high resolution geophysical imaging has been proposed which is based on the inversion of an exact solution to the reduced wave equation. The method is known as backpropagation because it propagates a received waveform back into the host formation mapping wavespeed variations. The implementation of backpropagation is complicated by the fact that it requires a complete characterization of the wave source and the wave propagation properties of a homogeneous host medium. The imaging procedure can be simplified by utilizing a zeroth-order phase approximation which allows implementation with first arrival times. Numerical experiments and a field study suggests that this approach is a practical means for high resolution subsurface imaging.
- OSTI ID:
- 5981309
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (USA), Vol. 17:6; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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