3-D Ray-Tracing: Application to Tomography , by Jean Luc Guiziou

A fast ray-tracing algorithm based on continuation techniques enables us to model the traveltime of seismic rays which propagate through a three-dimensional layered medium. The algorithm is designed to handle many seismic lines spread on the surface of the earth arbitrarily. This ray-tracing is applied to a tomographic procedure so as to recover a 3-D layered image of the subsurface. The analytical link between the ray-tracing algorithm and the non-linear inversion algorithm leads to a computationally efficient tomographic scheme. A few synthetic examples demonstrate the method's ability to provide a reliable image of the earth.}


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