Surface Related Multiple Attenuation (SRMA)
SRMA is a data-driven process for attenuation of multiples which experience at least one bounce off the water surface, peg-legs and water layer multiples. In principle the method works regardless of the dip of the water-bottom and subsurface. However successful application of SRMA relies on faithful capture of the wave-field at the multiple bounce points. In contrast, multiple bounces from cross dip events are unlikely to be captured within the acquisition aperture. SRMA works in two steps, data driven multiple prediction and adaptive subtraction of the multiple model. If no receiver coverage exists at the multiple bounce points, the predicted multiples will be time shifted with respect to the true multiples, making adaptive subtraction much more difficult or impossible.