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Next: Acknowledgments Up: Image space attenuation of Previous: Extension to 3D data


To attenuate multiples in the image space via filtering in the Radon domain, we need an accurate representation of their residual moveouts in either SODCIGs or ADCIGs. Accounting for ray-bending at the multiple-generating interface increases the focusing power of the Radon transform and therefore the separation between primaries and multiples.

The apex-shifted Radon transform in ADCIGs to map from $(z,\gamma)$ to $(z',q,h)$ has proven to be effective in attenuating specular and diffracted multiples in 2D marine data. The residual moveout of both multiples in ADCIGs is well-behaved and the extra dimension provided by the apex-shift allows the attenuation of the multiples without compromising the integrity of the primaries.