f Multiple suppression in the Barents Sea using the generalised radon transform as a notch velocity filter

The generalised Radon transform has been proposed as a means of multiple attenuation on CDP records. Initial results, especially on synthetic data, suggested an improvement in both velocity resolution and amplitude preservation compared to conventional FK techniques. The generalised Radon transform discriminates between primaries and multiples by measuring their curvature with respect to offset unlike the FK transform which discriminates on the basis of gradient. The use of curvature offers the possibility of separating primaries from multiples even at very short offsets. It is also possible to separate multiples with smaller velocity differences than is possible with FK methods. However, despite the initial optimism, generalised Radon transform techniques have failed to replace FK methods as the industry standard. This is partly because of the increased cost and partly because of technica1 prob1ems.