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Next: acknowledgments Up: Tang and Biondi: Target-oriented Previous: Field-data examples


We have presented a cost-effective method for image-domain wavefield tomography. Instead of using the original data set for velocity estimation, our method uses demigrated Born data, which can be simulated in a target-oriented fashion and hence much smaller in size. Field-data examples demonstrate that the simulated new data set can successfully preserve velocity information that is useful for velocity analysis and can be used for velocity inversion with low computational cost.