(9) |

We can, therefore, compute a linear wavefield perturbation using a Born WEMVA operator:

(10) |

(11) |

For wave-equation MVA, we are interested in applying an inverse WEMVA operator to a given image perturbation. Therefore, the main challenge of the linearized WEMVA is to estimate correctly , i.e. an image perturbation corresponding to the accumulated phase differences given by all slowness anomalies above each image point.

Given an image perturbation ,we can compute a wavefield perturbation by the adjoint of the imaging operator, from which we can compute a slowness perturbation based on the background wavefield :

(12) |

10/14/2003