Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5151997
C. Jeong, V. Panchang
During 2004 and 2005, four severe hurricanes - Ivan, Dennis, Katrina, and Rita - occurred in the Gulf of Mexico. These hurricanes created winds and waves that were close to or exceeded the calculated 100 years return period conditions. As a result, new estimates of extreme metocean conditions are needed for many offshore engineering applications. Recently, such estimates have been derived by Berek et al. (2007) using hindcast (modeled) data. In some regions of the Gulf, these new (proposed) estimates suggest a substantial increase, relative to the American Petroleum Institute's current estimates of the 100-year design conditions, the maximum wave heights increasing by as much as 6.4 m and the wind speeds by 5 m/s. We have therefore reexamined the problem and obtained additional estimates in the Gulf of Mexico using other methods. To overcome difficulties associated with synthetic data which can generally subject to modeling related errors, we use buoy data. At several locations, nearly 32 years of data are available. (According to a rule of thumb, extrapolations to three or four times the data length are appropriate). In the context of statistical modeling of extremes, the basic problem is ill-posed. Various difficulties and the need for multiple or even non-standard tools have been noted in the literature. Instead of the traditional methodology of using one or more distribution (e.g. Gumbel, Weibull, Frechet, etc.), we used the Generalized Extreme Value distribution, which eliminates the need for identifying the most appropriate distribution. Also, to increase the utility and value of possibly short datasets, we use the r-largest order statistic (instead of the annual maximum traditionally used). This approach is intended to make more efficient use of the data and to mitigate concerns about small dataset length. Using these methods, estimates of the significant wave heights and wind-speeds are derived for the Gulf of Mexico and compared with the estimates of Berek et al. (2007). Besides traditional statistical aspects, factors such as long-term trends in wave height changes must also be considered. In the literature, such trends have been noted off both US coasts. We estimate an average increase of 3.5 cm/year in the annual maximum significant wave heights; Komar and Allan (2007) give an estimate of 1.7 cm/year for the location of a buoy in the mid-Atlantic. Based on these our study has made initial attempts to include an appropriate ldquotrend parameterrdquo in the n-year return period calculation.
{"title":"Measurement-based estimates of extreme wave conditions for the Gulf of Mexico","authors":"C. Jeong, V. Panchang","doi":"10.1109/OCEANS.2008.5151997","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5151997","url":null,"abstract":"During 2004 and 2005, four severe hurricanes - Ivan, Dennis, Katrina, and Rita - occurred in the Gulf of Mexico. These hurricanes created winds and waves that were close to or exceeded the calculated 100 years return period conditions. As a result, new estimates of extreme metocean conditions are needed for many offshore engineering applications. Recently, such estimates have been derived by Berek et al. (2007) using hindcast (modeled) data. In some regions of the Gulf, these new (proposed) estimates suggest a substantial increase, relative to the American Petroleum Institute's current estimates of the 100-year design conditions, the maximum wave heights increasing by as much as 6.4 m and the wind speeds by 5 m/s. We have therefore reexamined the problem and obtained additional estimates in the Gulf of Mexico using other methods. To overcome difficulties associated with synthetic data which can generally subject to modeling related errors, we use buoy data. At several locations, nearly 32 years of data are available. (According to a rule of thumb, extrapolations to three or four times the data length are appropriate). In the context of statistical modeling of extremes, the basic problem is ill-posed. Various difficulties and the need for multiple or even non-standard tools have been noted in the literature. Instead of the traditional methodology of using one or more distribution (e.g. Gumbel, Weibull, Frechet, etc.), we used the Generalized Extreme Value distribution, which eliminates the need for identifying the most appropriate distribution. Also, to increase the utility and value of possibly short datasets, we use the r-largest order statistic (instead of the annual maximum traditionally used). This approach is intended to make more efficient use of the data and to mitigate concerns about small dataset length. Using these methods, estimates of the significant wave heights and wind-speeds are derived for the Gulf of Mexico and compared with the estimates of Berek et al. (2007). Besides traditional statistical aspects, factors such as long-term trends in wave height changes must also be considered. In the literature, such trends have been noted off both US coasts. We estimate an average increase of 3.5 cm/year in the annual maximum significant wave heights; Komar and Allan (2007) give an estimate of 1.7 cm/year for the location of a buoy in the mid-Atlantic. Based on these our study has made initial attempts to include an appropriate ldquotrend parameterrdquo in the n-year return period calculation.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127878433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5152116
P. Rynne, K. V. von Ellenrieder
This paper outlines the development of the Wind and Solar Powered Autonomous Surface Vehicle (WASP), an unmanned autonomous long-range surface vehicle. We aim to develop mission specific systems to forecast environmental events and to trace the distribution of meteorological and ocean conditions over a long-term period (about 6 months at a time). The WASP consists of a 2.4 Meter Class Sailboat hull, a composite wing, a 2000 Watt-hour battery reservoir, a system of control actuators, a control system running from a LPC 2138 Development Board, a suite of oceanographic sensors, and potential power regeneration from both solar and wind energy. This paper briefly discusses the motivation for such system development, adresses key aspects of the design, comments on modeling, and concludes with recommendations of future work.
{"title":"A wind and Solar-Powered Autonomous Surface Vehicle for sea surface measurements","authors":"P. Rynne, K. V. von Ellenrieder","doi":"10.1109/OCEANS.2008.5152116","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5152116","url":null,"abstract":"This paper outlines the development of the Wind and Solar Powered Autonomous Surface Vehicle (WASP), an unmanned autonomous long-range surface vehicle. We aim to develop mission specific systems to forecast environmental events and to trace the distribution of meteorological and ocean conditions over a long-term period (about 6 months at a time). The WASP consists of a 2.4 Meter Class Sailboat hull, a composite wing, a 2000 Watt-hour battery reservoir, a system of control actuators, a control system running from a LPC 2138 Development Board, a suite of oceanographic sensors, and potential power regeneration from both solar and wind energy. This paper briefly discusses the motivation for such system development, adresses key aspects of the design, comments on modeling, and concludes with recommendations of future work.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126393279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5151944
Haibin Yu, Jingbiao Liu, Wenyu Cai
A real-time long distance video transmission system to keep a close watch on sampling devices' activities is very necessary to the deep-sea area sampling. To overcome the vulnerability of the optic fiber and the low-quality of the video transmission of the other wired unrepeatered video transmission technology, a deep-sea unrepeatered video transmission system over 10 km coaxial tow cable based on SHDSL is presented in this paper. The system is composed of video server, SHDSL modem and transmission medium. The results of the field tests show that the video transmission rate of the system in this paper can achieve up to 1590 kbps, the quality of the video transmitted by the system is good and there is no obvious color or detail loss in the video output.
{"title":"Deep-sea unrepeatered video transmission system over 10 km coaxial tow cable based on SHDSL","authors":"Haibin Yu, Jingbiao Liu, Wenyu Cai","doi":"10.1109/OCEANS.2008.5151944","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5151944","url":null,"abstract":"A real-time long distance video transmission system to keep a close watch on sampling devices' activities is very necessary to the deep-sea area sampling. To overcome the vulnerability of the optic fiber and the low-quality of the video transmission of the other wired unrepeatered video transmission technology, a deep-sea unrepeatered video transmission system over 10 km coaxial tow cable based on SHDSL is presented in this paper. The system is composed of video server, SHDSL modem and transmission medium. The results of the field tests show that the video transmission rate of the system in this paper can achieve up to 1590 kbps, the quality of the video transmitted by the system is good and there is no obvious color or detail loss in the video output.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125673838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Underwater vehicle development in Canada has been underway for more than 40 years. Most of this work has been carried out in British Columbia. The developments include Manned Submersibles, ROVs and AUVs. The user of these vehicles includes offshore petroleum, telephone cable maintenance, science, surveying, salvage, and military. The enabling technologies for these integrations are mature. Today, some services may not be provided by relevant agencies with marine missions worldwide as they are short of the funding needed to discharge duties. There is the constant lament that there are not enough ships, people, or hardware. Perhaps if we are smart enough we can accomplish a portion of these tasks using advanced technology which may be considered today to be unconventional wisdom - namely robotics. Some may observe that many types of underwater vehicles already exist, or at least subsets exist. Therefore, some might wonder if they are any good and why are not more people using them? The reasons are that there is confusion regarding where to establish the boundary conditions for proper comparisons of performance. Also, all the potential vehicle integrations have not been fielded. An important aspect of acceptance limiting the use of vehicles is represented by the changes required in personnel establishment and training. We are in a period of transition and in these transitional periods false starts can be expected as the vision of the customer and the supplier is not necessarily clear because of lack of hands on experience. We sometimes see this lack of experience manifested in specifications which describe impossible-to-build vehicles. This paper presents the use of existing integrations which have contributed to the development of hybrid vehicles. This contributes to the capability to integrate systems to acquire the data to support the acquisition of data for the submission to the Internal Sea Bed Authority in accordance with Article 76. Article 76 provides instructions regarding how coastal states to exercise sovereign rights beyond the customary 200 nautical mile limit. The procedures for defining the outer limits of extended jurisdiction are based upon bathymetric and geological criteria. The procedures impose requirements to assemble, manipulate, visualize, and analyze a wide range of information in an accurate and well-documented fashion that is consistent with the reporting requirements of the International Seabed Authority. Underwater vehicles will be used to obtain some of the information required.
{"title":"Tethered and untethered vehicles: The future is in the past","authors":"J. McFarlane","doi":"10.4031/MTSJ.43.2.5","DOIUrl":"https://doi.org/10.4031/MTSJ.43.2.5","url":null,"abstract":"Underwater vehicle development in Canada has been underway for more than 40 years. Most of this work has been carried out in British Columbia. The developments include Manned Submersibles, ROVs and AUVs. The user of these vehicles includes offshore petroleum, telephone cable maintenance, science, surveying, salvage, and military. The enabling technologies for these integrations are mature. Today, some services may not be provided by relevant agencies with marine missions worldwide as they are short of the funding needed to discharge duties. There is the constant lament that there are not enough ships, people, or hardware. Perhaps if we are smart enough we can accomplish a portion of these tasks using advanced technology which may be considered today to be unconventional wisdom - namely robotics. Some may observe that many types of underwater vehicles already exist, or at least subsets exist. Therefore, some might wonder if they are any good and why are not more people using them? The reasons are that there is confusion regarding where to establish the boundary conditions for proper comparisons of performance. Also, all the potential vehicle integrations have not been fielded. An important aspect of acceptance limiting the use of vehicles is represented by the changes required in personnel establishment and training. We are in a period of transition and in these transitional periods false starts can be expected as the vision of the customer and the supplier is not necessarily clear because of lack of hands on experience. We sometimes see this lack of experience manifested in specifications which describe impossible-to-build vehicles. This paper presents the use of existing integrations which have contributed to the development of hybrid vehicles. This contributes to the capability to integrate systems to acquire the data to support the acquisition of data for the submission to the Internal Sea Bed Authority in accordance with Article 76. Article 76 provides instructions regarding how coastal states to exercise sovereign rights beyond the customary 200 nautical mile limit. The procedures for defining the outer limits of extended jurisdiction are based upon bathymetric and geological criteria. The procedures impose requirements to assemble, manipulate, visualize, and analyze a wide range of information in an accurate and well-documented fashion that is consistent with the reporting requirements of the International Seabed Authority. Underwater vehicles will be used to obtain some of the information required.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125693864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5152052
J. Manley
To celebrate the 40th Anniversary of the Oceanic Engineering Society (OES) at the MTS/IEEE OCEANS 2008 Conference in Quebec City a series of review papers were requested from OES technical committee chairs. In response to that request this paper provides a review of the field of unmanned surface vehicles (USVs) and autonomous surface craft (ASCs). The paper discusses the enabling technologies that have allowed USVs to emerge as a viable platform for marine operations as well as the application areas where they offer value. The paper tracks developments in technology from early systems developed by the author in 1993 through the latest developments and demonstration programs. The future outlook for USV technology is also described.
{"title":"Unmanned surface vehicles, 15 years of development","authors":"J. Manley","doi":"10.1109/OCEANS.2008.5152052","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5152052","url":null,"abstract":"To celebrate the 40th Anniversary of the Oceanic Engineering Society (OES) at the MTS/IEEE OCEANS 2008 Conference in Quebec City a series of review papers were requested from OES technical committee chairs. In response to that request this paper provides a review of the field of unmanned surface vehicles (USVs) and autonomous surface craft (ASCs). The paper discusses the enabling technologies that have allowed USVs to emerge as a viable platform for marine operations as well as the application areas where they offer value. The paper tracks developments in technology from early systems developed by the author in 1993 through the latest developments and demonstration programs. The future outlook for USV technology is also described.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121454955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5151888
S. Suzuki, S. Sukizaki, Y. Ishihara, I. Yabe, K. Nakata, P. Yapa, L.K. Dasanayaka, U. Bandara
Recently development of cheaper and cleaner energy sources has become a more important and urgent issue, because of the soaring crude oil price and environmental problems such as global warming. In this social context, to establish basic technologies and solve fundamental issues associated with environmental impact assessments, the Environmental Impact Assessment Group of the Research Consortium for Methane Hydrate Resources (MH21 research consortium) in Japan has conducted a number of research and development activities since FY2001. These activities include: (1) surveys of the marine environment that will form the basis of environmental impact assessments associated with methane hydrate development; (2) the development of core technologies to monitor deep-sea environments;( 3) research of major issues related to environmental impact assessments; and (4) the development of numerical models to predict the deformation of seafloor sediments containing methane hydrates. In this paper introduce of the research activities by the marine environment survey and assessment subgroup in the research consortium for methane hydrate resources in Japan.
{"title":"Research activities by the marine environment survey and assessment subgroup in the research consortium for methane hydrate resources (MH21 project) in Japan","authors":"S. Suzuki, S. Sukizaki, Y. Ishihara, I. Yabe, K. Nakata, P. Yapa, L.K. Dasanayaka, U. Bandara","doi":"10.1109/OCEANS.2008.5151888","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5151888","url":null,"abstract":"Recently development of cheaper and cleaner energy sources has become a more important and urgent issue, because of the soaring crude oil price and environmental problems such as global warming. In this social context, to establish basic technologies and solve fundamental issues associated with environmental impact assessments, the Environmental Impact Assessment Group of the Research Consortium for Methane Hydrate Resources (MH21 research consortium) in Japan has conducted a number of research and development activities since FY2001. These activities include: (1) surveys of the marine environment that will form the basis of environmental impact assessments associated with methane hydrate development; (2) the development of core technologies to monitor deep-sea environments;( 3) research of major issues related to environmental impact assessments; and (4) the development of numerical models to predict the deformation of seafloor sediments containing methane hydrates. In this paper introduce of the research activities by the marine environment survey and assessment subgroup in the research consortium for methane hydrate resources in Japan.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130129755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5151962
M.B. Ben Ticha, R. Garello, B. Chapron
Different physical phenomena could affect the wind fields retrieved using synthetic aperture radars or scatterometers. The influence of these phenomena varies with the spatial scales considered. In this paper, using multi-scale analysis, we compare wind data obtained via different sources. Scatterometer data is integrated into a blended wind product available at IFREMER. This product is the result of an optimal interpolation, based on the kriging approach, of ECMWF analysis wind fields, radiometers and scatterometers wind measurements. The blended wind fields have a spatial resolution of 0.25deg (~25 km). We use these wind fields in our analysis and compare them with wind fields retrieved using the synthetic aperture radar on-board ENVISAT with a spatial resolution of 1 km. The ability of synthetic aperture radars to retrieve wind measurements near the coast permits to evaluate the influence of some coastal effects, tidal currents for example. The study case considered in this paper is the northern coasts of the French region of Brittany. This study is undertaken under the framework of the MODENA project*.
{"title":"A multi-scale study of wind fields retrieved using synthetic aperture radars and scatterometers","authors":"M.B. Ben Ticha, R. Garello, B. Chapron","doi":"10.1109/OCEANS.2008.5151962","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5151962","url":null,"abstract":"Different physical phenomena could affect the wind fields retrieved using synthetic aperture radars or scatterometers. The influence of these phenomena varies with the spatial scales considered. In this paper, using multi-scale analysis, we compare wind data obtained via different sources. Scatterometer data is integrated into a blended wind product available at IFREMER. This product is the result of an optimal interpolation, based on the kriging approach, of ECMWF analysis wind fields, radiometers and scatterometers wind measurements. The blended wind fields have a spatial resolution of 0.25deg (~25 km). We use these wind fields in our analysis and compare them with wind fields retrieved using the synthetic aperture radar on-board ENVISAT with a spatial resolution of 1 km. The ability of synthetic aperture radars to retrieve wind measurements near the coast permits to evaluate the influence of some coastal effects, tidal currents for example. The study case considered in this paper is the northern coasts of the French region of Brittany. This study is undertaken under the framework of the MODENA project*.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134089035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5152071
R. Hansen, H. Callow, T. O. Saebo, P. E. Hagen, B. Langli
Synthetic aperture sonar (SAS) can produce images with centimetre-level resolution and area coverage of better than one square kilometer per hour. This makes SAS an ideal sensor for detection and classification of small targets over large areas. Fully automated target analysis allows improved autonomy when using autonomous underwater vehicles (AUVs) and saves a tedious manual analysis in post-mission analysis. Recognition of small targets in sonar imagery is, however, a difficult task. SAS imagery preserves wavenumber information. This gives the possibility for extra products in addition to high resolution imagery. We propose a two-stage processing where regions of interest are generated from reduced resolution SAS imagery and subsequently post processed images are used to generate relevant target analysis information. In this paper, we concentrate on the types of information available and their significance rather than the choice of intermediate resolution and initial detection methods. The extra processing products discussed in this paper are target-enhanced images by autofocus, shadow-enhanced images by fixed focusing, multi-aspect images, frequency-selective information and 3D shape from interferometry. We show examples of each of the additional products using data collected by the HISAS 1030 interferometric SAS carried by the HUGIN 1000-MR vehicle.
{"title":"High fidelity synthetic aperture sonar products for target analysis","authors":"R. Hansen, H. Callow, T. O. Saebo, P. E. Hagen, B. Langli","doi":"10.1109/OCEANS.2008.5152071","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5152071","url":null,"abstract":"Synthetic aperture sonar (SAS) can produce images with centimetre-level resolution and area coverage of better than one square kilometer per hour. This makes SAS an ideal sensor for detection and classification of small targets over large areas. Fully automated target analysis allows improved autonomy when using autonomous underwater vehicles (AUVs) and saves a tedious manual analysis in post-mission analysis. Recognition of small targets in sonar imagery is, however, a difficult task. SAS imagery preserves wavenumber information. This gives the possibility for extra products in addition to high resolution imagery. We propose a two-stage processing where regions of interest are generated from reduced resolution SAS imagery and subsequently post processed images are used to generate relevant target analysis information. In this paper, we concentrate on the types of information available and their significance rather than the choice of intermediate resolution and initial detection methods. The extra processing products discussed in this paper are target-enhanced images by autofocus, shadow-enhanced images by fixed focusing, multi-aspect images, frequency-selective information and 3D shape from interferometry. We show examples of each of the additional products using data collected by the HISAS 1030 interferometric SAS carried by the HUGIN 1000-MR vehicle.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134331528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5152077
L. Bender, N. Guinasso, J. Walpert, S. Howden
In August 2005 the eye of Hurricane Katrina passed 49 nm to the west of a 3-m discus buoy (USM3m01), in 20 m water depth, operated by the Central Gulf of Mexico Ocean Observing System (CenGOOS). Buoy wave heights were measured with an onboard 6-axis accelerometer and from the displacement of a GPS antenna as measured by Real-Time-Kinematic (RTK) GPS. The computed wave heights are compared to the nearby NDBC 42007 buoy and show reasonable agreement for wave heights less than 2-3 m. At higher wave heights there is a potential bias in the wave heights if the buoy's heel is not accounted for. This is believed to be the result of swell in shallow water, a heel in the buoy caused by wind and currents, and the failure to tilt-correct the accelerometer data.
{"title":"Wave heights from a 3m discus buoy during Hurricane Katrina","authors":"L. Bender, N. Guinasso, J. Walpert, S. Howden","doi":"10.1109/OCEANS.2008.5152077","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5152077","url":null,"abstract":"In August 2005 the eye of Hurricane Katrina passed 49 nm to the west of a 3-m discus buoy (USM3m01), in 20 m water depth, operated by the Central Gulf of Mexico Ocean Observing System (CenGOOS). Buoy wave heights were measured with an onboard 6-axis accelerometer and from the displacement of a GPS antenna as measured by Real-Time-Kinematic (RTK) GPS. The computed wave heights are compared to the nearby NDBC 42007 buoy and show reasonable agreement for wave heights less than 2-3 m. At higher wave heights there is a potential bias in the wave heights if the buoy's heel is not accounted for. This is believed to be the result of swell in shallow water, a heel in the buoy caused by wind and currents, and the failure to tilt-correct the accelerometer data.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130858848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-01DOI: 10.1109/OCEANS.2008.5152110
C. Benton, R. Nitzel, T. Zysk
This paper discusses how the close coupling of ocean and maritime models to augmented reality navigation systems can benefit both those seeking to understand the arctic environment better, and those seeking to operate more affordably and safely in arctic waters. The potential impact of adopting an augmented reality navigation technical solution for manned and unmanned systems in areas such as the Northwest Passage are examined, including the potential for cost savings while improving safety in Aids to Navigation programs, along with optimization of seasonal shipping lane usage.
{"title":"Merging ocean/maritime models and arctic operations using mission planning toolkits and augmented reality","authors":"C. Benton, R. Nitzel, T. Zysk","doi":"10.1109/OCEANS.2008.5152110","DOIUrl":"https://doi.org/10.1109/OCEANS.2008.5152110","url":null,"abstract":"This paper discusses how the close coupling of ocean and maritime models to augmented reality navigation systems can benefit both those seeking to understand the arctic environment better, and those seeking to operate more affordably and safely in arctic waters. The potential impact of adopting an augmented reality navigation technical solution for manned and unmanned systems in areas such as the Northwest Passage are examined, including the potential for cost savings while improving safety in Aids to Navigation programs, along with optimization of seasonal shipping lane usage.","PeriodicalId":113677,"journal":{"name":"OCEANS 2008","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131033736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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