Abstract
Summary Based on the full-wave equation, reverse time migration (RTM) can handle wave propagation in all directions without angle limitation. However, the wide-angle capability of full-wave propagator creates artifacts in migrated image if the conventional imaging condition (zero-lag cross-correlation) is applied. In this paper, we propose a new imaging condition to attenuate these artifacts by decomposing the full wavefields at every image location to local plane waves of different directions, followed by constructing the image by correlating certain combinations of the plane-wave components. Synthetic examples demonstrate that this imaging condition can effectively remove the undesired artifacts in both simple and complex model.
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