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SPECIAL ISSUE TECHNICAL PAPERS

Intercomparison of Sea-State and Zero-Crossing Parameters From the WACSIS Field Experiment and Interpretation Using Video Evidence

[+] Author and Article Information
Stephen F. Barstow

OCEANOR ASA, Pir-Senteret, N-7005 Trondheim, Norway e-mail: sbarstow@oceanor.no

Harald E. Krogstad

Dept. Math. Sciences, NTNU, N-7491 Trondheim, Norway e-mail: Harald.Krogstad@math.ntnu.no

Lasse Lønseth, Jan Petter Mathisen, Gunnar Mørk, Peter Schjølberg

OCEANOR ASA

J. Offshore Mech. Arct. Eng 126(1), 35-42 (Mar 02, 2004) (8 pages) doi:10.1115/1.1641389 History: Received October 01, 2002; Revised April 01, 2003; Online March 02, 2004
Copyright © 2004 by ASME
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References

Figures

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Location of the Meetpost Noordwijk platform off the Dutch coast
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Peak wave period versus significant wave height for the final analysis data set
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Wave direction at the spectral peak versus significant wave height for the final analysis data set
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Definition of generic single-wave parameters for the up and down crossing analyses
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Scatter plots for significant wave height, Hm0, for each sensor relative to the EMI laser
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Scatter plots and regression statistics for peak wave period from each instrument against simultaneous measurements from the EMI laser
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Scatter plots of skewness versus skewness of the Hilbert Transformed series
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Scatter plots of Crest Front Rate minus Crest Back Rate against wave height for all individual waves over 6 m. For the Marex radar, only data from daylight hours are included.
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Scatter plots of crest height divided by wave height (AMUCH) against wave height for all individual waves over 5 m. For the Marex, only data from daylight hours are included.
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Stack plot of simultaneous measurements during the 20 minute sequence with the highest sea-state with all 6 sensors working; Hm0=4.6 m
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Example of the video images during a storm on March 5, 1998
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Simultaneous Marex radar and EMI laser wave profiles for the four highest crests for which simultaneous recordings exist
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Trend for skewness to increase with Hmo from the Marex radar daytime data.

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