A first-order k-space model for elastic wave propagation in heterogeneous media.

@article{Firouzi2012AFK,
  title={A first-order k-space model for elastic wave propagation in heterogeneous media.},
  author={K Firouzi and B. T. Cox and Bradley E. Treeby and N Saffari},
  journal={The Journal of the Acoustical Society of America},
  year={2012},
  volume={132 3},
  pages={1271-83}
}
A pseudospectral model of linear elastic wave propagation is described based on the first order stress-velocity equations of elastodynamics. k-space adjustments to the spectral gradient calculations are derived from the dyadic Green's function solution to the second-order elastic wave equation and used to (a) ensure the solution is exact for homogeneous wave propagation for timesteps of arbitrarily large size, and (b) also allows larger time steps without loss of accuracy in heterogeneous media… CONTINUE READING
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