Non-Directional Wave Buoy at 17 m Depth at USACE Field Research Facility 1980-1996

DOI

USACE / FRF has maintained wave buoys around the 17 m and/or 20 m depth contour since 1980. Over the years, we have used three different types of waverider buoys manufactured by Datawell B.V. (Haarlem, Netherlands). From 1980 until 1996, we used non-directional buoys, first the 0.7 m hull diameter design and then the 0.9 m hull diameter design. The buoys operate by recording the output of an accelerometer suspended in fluid and gimbaled (Hippy-40). For data prior to September 1986, data were recorded at 2 or 4 Hz and record lengths were either 34 or 17 minutes, respectively. Collection intervals were either three hours or six hours. From September 1986 to November 1996 data was collected hourly. Frequency spectra were computed using the Welch method with 50% overlapped ensembles [1]. From the end of 1996 onward, we have maintained 0.9 m hull diameter Directional Waverider MkII and MKIII buoys [2] that, in addition to vertical acceleration, also measure two orthogonal components of horizontal acceleration. From Feb 1997 to May 2005, time series were collected at 1.28 Hz and cross-spectral analysis was performed on shore [3, 4]. Between May 2005 and May 2013, directional Fourier coefficients computed on-board the buoy and transmitted onshore. Since May 2013, data analysis has been manged through the Coastal Data Information Program (CDIP), UCSD San Diego, CA. Data are transmitted via an Iridium satellite link at half-hour intervals. Two dimensional (2D) frequency-direction spectra are computed using an Iterative Maximum Likelihood Estimator (IMLE) method [5].For more information see FRF data paper, FRF website and data portal, and CDIP website. [1] Welch, P (1967) [2] de Vries, JJ (2014) [3] Longuet-Higgins, M.S., Cartwright, D.E. and Smith, N.D. (1963)[4] Earle, M.D., Steele, K.E. and Wang, D.W.C. (1999)[5] Oltman-Shay, J. and Guza, R.T. (1984)

Identifier
DOI https://doi.org/10.1594/PANGAEA.902950
Related Identifier IsPartOf https://doi.org/10.1594/PANGAEA.902954
Related Identifier References https://doi.org/10.1016/S0029-8018(99)00010-4
Related Identifier References https://doi.org/10.1016/0011-7471(65)91457-9
Related Identifier https://doi.org/10.1175/1520-0485(1984)014<1800:ADAOWD>2.0.CO
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.902950
Provenance
Creator Collins, Clarence (ORCID: 0000-0003-4553-616X); Hathaway, Kent K; Birkemeier, William A ORCID logo; Forte, Michael F; Dickhudt, Patrick J; The FRF Data Team
Publisher PANGAEA
Contributor U.S. Army Corps of Engineers
Publication Year 2019
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format application/x-netcdf
Size 9.5 MBytes
Discipline Earth System Research
Spatial Coverage (-75.750 LON, 36.183 LAT); North Carolina