Directional wave measurements using an autonomous vessel
An autonomous vessel, the Offshore Sensing Sailbuoy, was used for wave measurements near the Ekofisk oil platform complex in the North Sea (56.5º N, 3.2º E, operated by ConocoPhillips) from 6 to 20 November 2015. Being 100 % wind propelled, the Sailbuoy has two-way communication via the Iridium netw...
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ftunivbergen:oai:bora.uib.no:1956/12893 2023-05-15T15:11:44+02:00 Directional wave measurements using an autonomous vessel Hole, L. R. Fer, Ilker Peddie, David 2016-09-13T09:16:59Z application/pdf https://hdl.handle.net/1956/12893 https://doi.org/10.1007/s10236-016-0969-4 eng eng Springer urn:issn:1616-7228 https://hdl.handle.net/1956/12893 https://doi.org/10.1007/s10236-016-0969-4 cristin:1380731 Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright 2016 the authors Surface Waves Directional Autonomous Vessel Measurements North Sea Peer reviewed Journal article 2016 ftunivbergen https://doi.org/10.1007/s10236-016-0969-4 2023-03-14T17:40:40Z An autonomous vessel, the Offshore Sensing Sailbuoy, was used for wave measurements near the Ekofisk oil platform complex in the North Sea (56.5º N, 3.2º E, operated by ConocoPhillips) from 6 to 20 November 2015. Being 100 % wind propelled, the Sailbuoy has two-way communication via the Iridium network and has the capability for missions of 6 months or more. It has previously been deployed in the Arctic, Norwegian Sea and the Gulf of Mexico, but the present study was the first test for wave measurements. During the campaign the Sailbuoy held position about 20 km northeast of Ekofisk (on the lee side) during rough conditions. Mean wind speed measured at Ekofisk during the campaign was 9.8 m/s, with a maximum of 20.4 m/s, with wind mostly from south and southwest. A Datawell MOSE G1000 GPS-based 2 Hz wave sensor was mounted on the Sailbuoy. Mean significant wave height (Hs 1 min) measured was 3 m, whereas maximum Hs was 6 m. Mean wave period was 7.7 s, while maximum wave height, Hmax, was 12.6 m. These measurements have been compared with non-directional Waverider observations at the Ekofisk complex. The agreement between the two data sets was very good, with a mean percent absolute error of 7 % and a linear correlation coefficient of 0.97. The wave frequency spectra measured by the two instruments compared very wel l , except for low Hs (∼1 m), where the motion of the vessel seemed to influence the measurements. Nevertheless, the Sailbuoy performed well during this campaign, and results suggest that it is a suitable platform for wave measurements in a broad range of sea conditions. publishedVersion Article in Journal/Newspaper Arctic Norwegian Sea University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Norwegian Sea Ocean Dynamics 66 9 1087 1098 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Surface Waves Directional Autonomous Vessel Measurements North Sea |
spellingShingle |
Surface Waves Directional Autonomous Vessel Measurements North Sea Hole, L. R. Fer, Ilker Peddie, David Directional wave measurements using an autonomous vessel |
topic_facet |
Surface Waves Directional Autonomous Vessel Measurements North Sea |
description |
An autonomous vessel, the Offshore Sensing Sailbuoy, was used for wave measurements near the Ekofisk oil platform complex in the North Sea (56.5º N, 3.2º E, operated by ConocoPhillips) from 6 to 20 November 2015. Being 100 % wind propelled, the Sailbuoy has two-way communication via the Iridium network and has the capability for missions of 6 months or more. It has previously been deployed in the Arctic, Norwegian Sea and the Gulf of Mexico, but the present study was the first test for wave measurements. During the campaign the Sailbuoy held position about 20 km northeast of Ekofisk (on the lee side) during rough conditions. Mean wind speed measured at Ekofisk during the campaign was 9.8 m/s, with a maximum of 20.4 m/s, with wind mostly from south and southwest. A Datawell MOSE G1000 GPS-based 2 Hz wave sensor was mounted on the Sailbuoy. Mean significant wave height (Hs 1 min) measured was 3 m, whereas maximum Hs was 6 m. Mean wave period was 7.7 s, while maximum wave height, Hmax, was 12.6 m. These measurements have been compared with non-directional Waverider observations at the Ekofisk complex. The agreement between the two data sets was very good, with a mean percent absolute error of 7 % and a linear correlation coefficient of 0.97. The wave frequency spectra measured by the two instruments compared very wel l , except for low Hs (∼1 m), where the motion of the vessel seemed to influence the measurements. Nevertheless, the Sailbuoy performed well during this campaign, and results suggest that it is a suitable platform for wave measurements in a broad range of sea conditions. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hole, L. R. Fer, Ilker Peddie, David |
author_facet |
Hole, L. R. Fer, Ilker Peddie, David |
author_sort |
Hole, L. R. |
title |
Directional wave measurements using an autonomous vessel |
title_short |
Directional wave measurements using an autonomous vessel |
title_full |
Directional wave measurements using an autonomous vessel |
title_fullStr |
Directional wave measurements using an autonomous vessel |
title_full_unstemmed |
Directional wave measurements using an autonomous vessel |
title_sort |
directional wave measurements using an autonomous vessel |
publisher |
Springer |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/12893 https://doi.org/10.1007/s10236-016-0969-4 |
geographic |
Arctic Norwegian Sea |
geographic_facet |
Arctic Norwegian Sea |
genre |
Arctic Norwegian Sea |
genre_facet |
Arctic Norwegian Sea |
op_relation |
urn:issn:1616-7228 https://hdl.handle.net/1956/12893 https://doi.org/10.1007/s10236-016-0969-4 cristin:1380731 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright 2016 the authors |
op_doi |
https://doi.org/10.1007/s10236-016-0969-4 |
container_title |
Ocean Dynamics |
container_volume |
66 |
container_issue |
9 |
container_start_page |
1087 |
op_container_end_page |
1098 |
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1766342542231601152 |