Wave Crest Sensor Intercomparison Study: An Overview of WACSIS

[+] Author and Article Information
George Z. Forristall

Shell Global Solutions International, B.V., Volmerlaan 8, 2280AB Rijswijk, The Netherlandse-mail: g.forristall@siep.shell.com

Stephen F. Barstow

OCEANOR-Oceanographic Company of Norway, Pir-Senteret N7005, Trondheim, Norway

Harald E. Krogstad

Dept. Mathematical Sciences, NTNU N7491, Trondheim, Norway

Marc Prevosto

IFREMER-Center de BREST, BP 70, 29280 Plouzane, France

Paul H. Taylor

Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ UK

Peter S. Tromans

Peter Tromans Engineering, Den Haag Bezuidenhoutseweg 496, 2594 BG Den Haag, The Netherlands

J. Offshore Mech. Arct. Eng 126(1), 26-34 (Mar 02, 2004) (9 pages) doi:10.1115/1.1641388 History: Received October 01, 2002; Revised February 01, 2003; Online March 02, 2004
Copyright © 2004 by ASME
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North face of the MPN. Most of the instruments were mounted on an arm extending from above the center leg on this face.
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Plan view of the sensor layout on the platform. Sensor locations are shown by green dots. Dimensions are in centimeters and the elevation of the sensors above mean water level is shown next to the name of the sensor. North is toward the top of the figure. The checkerboard pattern denotes the heliport above the main platform structure.
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Sample frame from the digital video files for 16:30:56 on Jan. 3, 1998. A wave which has broken against the platform leg is passing under the Baylor wave staff and Marex radar.
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Power spectra from the platform mounted instruments form April 13, 1998 at 1400. The significant wave height at the time was 3.14 m.
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Crest height ratios for significant wave heights between 4.0 and 4.5 m.
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Comparison of crest height ratios of measurements low pass filtered at 0.64 Hz and second order simulations for significant wave heights between 4.0 and 4.5 m.
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Average linearized ad second order shapes of waves measured by the Saab radar during the storm of Jan. 6, 1988. The legend indicates the amplitude bins over which the averages were taken.
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Joint crest height and crest period distribution from the Baylor wave staff at 1200 on March 1, 1988. The Lund model is that described by Rychlik et al. (1997).
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Probability density of maximum crest heights during the Frigg storm. The water depth has been varied but the storm history has been kept the same.
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Comparisons of crest height ratios of measurements low pass filtered at 0.64 Hz and parametric models of crest heights for significant wave heights between 4.0 and 4.5 m.




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