Articles | Volume 5, issue 1
https://doi.org/10.5194/gi-5-17-2016
https://doi.org/10.5194/gi-5-17-2016
Research article
 | 
05 Feb 2016
Research article |  | 05 Feb 2016

Removing low-frequency artefacts from Datawell DWR-G4 wave buoy measurements

J.-V. Björkqvist, H. Pettersson, L. Laakso, K. K. Kahma, H. Jokinen, and P. Kosloff

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Cited articles

Ashton, I. G. C. and Johanning, L.: On errors in low frequency wave measurements from wave buoys, Ocean Eng., 95, 11–22, https://doi.org/10.1016/j.oceaneng.2014.11.033, 2015.
Bendat, J. S. and Piersol, A. G.: Random Data: Analysis and Measurement Procedures, 4th Edn., Wiley Series in Probability and Statistics, Hoboken, New Jersey, 2010.
Datawell BV: Datawell Waverider Manual DWR4, available at: http://datawell.xcess-5.xec.nl/Portals/0/Documents/Manuals/datawell_manual_dwr4_2014-11-10.pdf (last access: 10 September 2015), 2014.
de Vries, J. J., Waldron, J., and Cunningham, V.: Field tests of the New Datawell DWR-G GPS wave buoy, Sea Technol., 44, 50–55, 2003.
Herbers, T. H. C., Jessen, P. F., Janssen, T. T., Colbert, D. B., and MacMahan, J. H.: Observing ocean surface waves with GPS-tracked buoys, J. Atmos. Ocean. Tech., 29, 944–959, https://doi.org/10.1175/JTECH-D-11-00128.1, 2012.
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Short summary
We identified a previously unknown artefact in the Datawell DWR-G4 wave buoy, which measures the GPS signal to resolve surface water waves. The artefact interferes with the part of the measurements containing information about the longer waves and must be removed to obtain accurate readings. We presented a correction method and found it to be accurate based on a comparison to measurements from a larger wave buoy that measures the movements of the device without using the GPS signal.