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Ship Propeller Noise Removal Using a Time-invariant Hyperbolic Radon Transform
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Ship propeller noise (SPN) is commonly observed in the marine seismic survey. The removal of the SPN is of vital importance for the high-quality seismic imaging. In this paper, we propose an automatic approach to recognize the trajectory of the SPN and apply a time-invariant hyperbolic Radon transform (HRT) to suppress it. In the proposed method, the travel-time equation of the SPN is first derived, and then the apex of one dominant SPN event is detected using the lateral average filters. After that, an estimate of the distance between the noise source and the streamer is obtained by the semblance analysis. Finally, a time-invariant HRT, which can be implemented efficiently in the frequency domain, is applied to extract all the estimated SPN. To further improve the performance of the SPN removal, the iterative shrinkage algorithm is incorporated into the HRT by imposing sparseness constraints in the time domain. Both synthetic and real data examples demonstrate the effectiveness of the proposed method.