Conclusion

The combination of choosing the image space in the form of ADCIGs and the apex-shifted tangent-squared transformation from $(z,\gamma)$ to (z',q,h) has proven to be effective in attenuating specularly-reflected 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.