Non-linear optimization for seismic traveltime tomography |
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| Authors: | Ch Sebudandi Ph-L Toint |
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| Institution: | Department of Mathematics, Facultés Universitaires ND de la Paix, B-5000 Namur, Belgium |
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| Abstract: | This paper presents a non-linear algorithmic approach for seismic traveltime. It is based on large-scale optimization using non-linear least-squares and trust-region methods. These methods provide a natural way to stabilize algorithms based on Newton's iteration for non-linear minimization. They also correspond to an alternative (and often more efficient) view of the Levenberg-Marquardt method. Numerical experience on synthetic data and on real borehole-to-borehole problems are presented. In particular, results produced by the new algorithm are compared with those of Ivansson (1985) for the Kråkemåla experiment. |
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| Keywords: | Key words: crosshole tomography non-linear least squares seismic traveltimes trust-region strategy |
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