Observations of the Directional Distribution of Ocean-Wave Energy in Fetch-Limited Conditions

Holthuijsen, L.H.

doi:10.1175/1520-0485(1983)013<0191:ootddo>2.0.co;2

Cited by 81 publications

(43 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The baseline between the two cameras is set ranging between 2.5 m and 3.0 m. The cameras are synchronized by an external trigger which allows 5,10, and 15 Hz frame acquisition rates. The synchronization delay is kept within 1 ms as required for wave measurements (Holthuijsen, 1983). For each camera, a digital image data transfer rate up to 75 Megabyte/s is managed by a dedicated Giga Ethernet device and high performance hard drives at the acquisition workstation (see Fig.…”

Section: Wass Deployment At Acqua Altamentioning

confidence: 72%

Offshore stereo measurements of gravity waves

Benetazzo

Fedele

Gallego

et al. 2012

Coastal Engineering

111

104

View full text Add to dashboard Cite

Stereo video techniques are effective for estimating the space-time wave dynamics over an area of the ocean. Indeed, a stereo camera view allows retrieval of both spatial and temporal data whose statistical content is richer than that of time series data retrieved from point wave probes. To prove this, we consider an application of the Wave Acquisition Stereo System (WASS) for the analysis of offshore video measurements of gravity waves in the Northern Adriatic Sea. In particular, we deployed WASS at the oceanographic platform Acqua Alta, off the Venice coast, Italy. Three experimental studies were performed, and the overlapping field of view of the acquired stereo images covered an area of approximately 1100 m 2 . Analysis of the WASS measurements show that the sea surface can be accurately estimated in space and time together, yielding associated directional spectra and wave statistics that agree well with theoretical models. From the observed wavenumber-frequency spectrum one can also predict the vertical profile of the current flow underneath the wave surface. Finally, future improvements of WASS and applications are discussed.

show abstract

Section: Wass Deployment At Acqua Altamentioning

confidence: 72%

Offshore stereo measurements of gravity waves

Benetazzo

Fedele

Gallego

et al. 2012

Coastal Engineering

111

104

View full text Add to dashboard Cite

show abstract

“…8). If an oblique wind pattern persists during a long time, a system of long waves propagating along the coastline emerges (Holthuijsen, 1983). At times it may form the main spectral peak.…”

Section: Resultsmentioning

confidence: 99%

Wave conditions in the Baltic Proper and in the Gulf of Finland during windstorm Gudrun

Soomere

Behrens²,

Tuomi³

et al. 2008

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…The cameras are set at 2.5 m apart and they mount 5-mm focal length low distortion lenses (21-mm equivalent focal length in a 35-mm film camera). Camera synchronization is attained by an external trigger that allows different frame acquisition rates (5, 10, and 15 Hz) and the delay is kept within 1 ms as required for wave measurements (Holthuijsen, 1983). A dedicated Giga Ethernet device and high performance Hard Drives are used to manage digital image data transfer rate up to 75 Megabyte/s.…”

Section: Wass Deployments and Data Acquisitionmentioning

confidence: 99%