First-arrival traveltime tomography based on the adjoint-state method

@article{Taillandier2009FirstarrivalTT,
  title={First-arrival traveltime tomography based on the adjoint-state method},
  author={Cedric Taillandier and Mark Noble and Herv{\'e} Chauris and Henri Calandra},
  journal={Geophysics},
  year={2009},
  volume={74}
}
Classical algorithms used for traveltime tomography are not necessarily well suited for handling very large seismic data sets or for taking advantage of current supercomputers. The classical approach of first-arrival traveltime tomography was revisited with the proposal of a simple gradient-based approach that avoids ray tracing and estimation of the Frechet derivative matrix. The key point becomes the derivation of the gradient of the misfit function obtained by the adjoint-state technique… 

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