E036 Estimation and Compensation for Near-Surface Wavefield Distortions Using Blind Channel Identification R. van Vossen* (Utrecht University) & J. Trampert (Utrecht University) SUMMARY Near-surface wavefield perturbations can be very complex and completely mask target reflections. Despite this complexity conventional methods to compensate for these perturbations rely on simplified parameterizations and mainly focus on time shift corrections. We present a fully data-driven procedure which uses finite-impulse response filters to describe near-surface wavefield perturbations hence allowing time shifts to vary with frequency. These filters are obtained using blind channel identification. Subsequently the recorded data are compensated for the near-surface wavefield distortions using


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