Open Collections

Yarham, Carson; Boeniger, Urs; Herrmann, Felix J.

Society of Exploration Geophysicists

We have effectively identified and removed ground roll through a twostep process. The first step is to identify the major components of the ground roll through various methods including multiscale separation, directional or frequency filtering or by any other method that identifies the ground roll. Given this estimate for ground roll, the recorded signal is separated during the second step through a block-coordinate relaxation method that seeks the sparsest set for weighted curvelet coefficients of the ground roll and the sought-after reflectivity. The combination of these two methods allows us to separate out the ground roll signal while preserving the reflector information. Since our method is iterative, we have control of the separation process. We successfully tested our algorithm on a real data set with a complex ground roll and reflector structure.

Ground roll; Curvelet; Curvelet transform; Block-coordinate relaxation; Bayesian Threshold; Block solver

Text

eng

Vancouver : University of British Columbia Library

10.14288/1.0107402

Science, Faculty of; Earth and Ocean Sciences, Department of

Unreviewed

Herrmann, Felix J.