A Data Set of Sea Surface Stereo Images to Resolve Space-Time Wave Fields
Stereo imaging observations of the sea surface elevation provide unique field data to investigate geometry and dynamics of oceanic waves. Typically, this technique allows to retrieve the 4-D ocean topography (3-D space + time) at high frequency (up to 15-20 Hz) over a sea surface region of area ~10^4 m^2. Stereo data fill the existing wide gap between sea surface elevation time-measurements, like the local observation provided by wave buoys, and large-scale ocean observations by satellites. The analysis of stereo images provides a direct measurement of the wavefield without the need of any linear-wave theory assumption, so it is particularly interesting to investigate the nonlinearities of the wave field, wave-current interaction, rogue waves, wave-wave interaction, wave breaking, air-sea interaction, and potentially other processes not explored yet. In this context, this open data set aims at providing the oceanographic community, for the first time, valuable stereo measurements collected in different seas and wave conditions to invite the ocean-wave scientific community to continue exploring these data and to contribute to a better understanding of the nature of the sea surface dynamics.
Simple
- Title
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A Data Set of Sea Surface Stereo Images to Resolve Space-Time Wave Fields
- Date (Creation)
- 2017-12-25
- Date (Publication)
- 2019-11-26
- Citation identifier
- FR-330-715-368-00032-DATARMOR_SEA_SURFACE_STEREO_WAVE
- Citation identifier
- DOI:10.12770/af599f42-2770-4d6d-8209-13f40e2c292f
- Abstract
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Stereo imaging observations of the sea surface elevation provide unique field data to investigate geometry and dynamics of oceanic waves. Typically, this technique allows to retrieve the 4-D ocean topography (3-D space + time) at high frequency (up to 15-20 Hz) over a sea surface region of area ~10^4 m^2. Stereo data fill the existing wide gap between sea surface elevation time-measurements, like the local observation provided by wave buoys, and large-scale ocean observations by satellites. The analysis of stereo images provides a direct measurement of the wavefield without the need of any linear-wave theory assumption, so it is particularly interesting to investigate the nonlinearities of the wave field, wave-current interaction, rogue waves, wave-wave interaction, wave breaking, air-sea interaction, and potentially other processes not explored yet. In this context, this open data set aims at providing the oceanographic community, for the first time, valuable stereo measurements collected in different seas and wave conditions to invite the ocean-wave scientific community to continue exploring these data and to contribute to a better understanding of the nature of the sea surface dynamics.
- Credit
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Fabrice Ardhuin, Alvise Benetazzo, Pedro Veras Guimaraes
- Point of contact
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Organisation name Individual name Electronic mail address Role France Energies Marines, Plouzané, France
Pedro Veras Guimaraes
Author Univ. Brest, CNRS, IRD,Ifremer, Laboratoire d’Oceánographie Physique et Spatiale (LOPS) IUEM, Plouzané, France
Fabrice Ardhuin
Author DAIS - Università Ca’ Foscari, Venice, Italy
Filippo Bergamasco
Author Service hydrographique et océanographique de la Marine (SHOM, HOM, REC), Brest, 29200, France
Fabien Leckler
Author France Energies Marines, Plouzané, France
Jean-François Filipot
Author KIOST – Korea Institute of Ocean Science and Technology, Busan, South Korea
Jeseon Yoo
Author nstitute of Marine Sciences, Italian National Research Council (ISMAR-CNR), Venice, 30122, Italy
Alvise Benetazzo
Author IFREMER
Publisher
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GEMET - INSPIRE themes, version 1.0
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Meteorological geographical features
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Thèmes Sextant
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/Physical Environment/Climatology
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- Keywords
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Stereo video
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ocean waves
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wave breaking
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sea surface elevation
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- Use limitation
- CC-BY (Creative Commons - Attribution)
- Access constraints
- License
- Use constraints
- License
- Other legal constraints
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CC-BY (Creative Commons - Attribution)
- Spatial representation type
- Grid
- Language
- English
- Character set
- UTF8
- Topic category
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- Oceans
- Begin date
- 2011-09-30
- End date
- 2018-01-02
- Reference system identifier
- EPSG / WGS 84 (EPSG:4326) / 8.6
- Topology level
- Geometry only
- Number of dimensions
- 2
- Dimension name
- Column
- Dimension name
- Row
- Cell geometry
- Area
- Distribution format
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Name Version
- OnLine resource
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Protocol Linkage Name WWW:LINK
https://archimer.ifremer.fr/doc/00428/53934/ Publication
WWW:LINK-1.0-http--metadata-URL
http://dx.doi.org/10.12770/af599f42-2770-4d6d-8209-13f40e2c292f DOI of the dataset
- OnLine resource
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Protocol Linkage Name NETWORK:LINK
/home/ref-stereo
- OnLine resource
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Protocol Linkage Name WWW:DOWNLOAD-1.0-link--download
https://data-dataref.ifremer.fr/stereo/ Download link
- Hierarchy level
- Dataset
- Statement
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Stereo imaging measurement of the sea surface elevation is based on single snapshots or time records captured by a pair of synchronized and calibrated cameras. As a general principle, stereo imaging results in a surface elevation map zeta(x, y, t)in the horizontal physical 2-D space {x} = (x, y) and time {t}. The coverage area, accuracy, and resolution depend mostly on the experimental setup (e.g. the distance between the cameras), camera specifications, and lenses. One of the greatest advantage of having the space-time elevation field zeta(x, y, t) is to compute the 3-D wavenumber/frequency spectrum without the need of invoking any (e.g. linear) wave theory for background noise removal and signal selection. This is most important for the short wave components, for which nonlinear contributions are more significant.
This observation technique is very powerful to investigate many different process related to the sea surface and it brings a new perspective to investigate ocean waves, specially at mid to short scales. Stereo imaging connects the missing information between large to small-scale ocean observations (i.g, 10~m pixel resolution by SAR images) or a single point high frequency observation (wave gauge, moored buoys and others).
In this context, stereo video have been prof to be useful to explore different aspects of ocean waves.
We aim at presenting a valuable stereo-image data set, free available for the scientific community. This data set contains original records, calibration files, configuration files for processing, and examples of post-processed surface elevation maps collected during several oceanic campaigns, at different locations around the world ocean and under different sea state conditions. All this makes this data set especially useful to explore a common framework to investigate ocean waves and the sea surface dynamics.
Metadata
- File identifier
- af599f42-2770-4d6d-8209-13f40e2c292f
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2021-08-11T16:54:50
- Metadata standard name
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ISO 19115:2003/19139 - SEXTANT
- Metadata standard version
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1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role IFREMER
Accensi Mickael
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