Pub Date : 2011-12-19DOI: 10.23919/OCEANS.2011.6107288
M. Eblé, V. Titov, G. Mungov, C. Moore, D. Denbo, R. Bouchard
The United States National Oceanic and Atmospheric Administration tsunami forecasting capability under collaborative development between the National Weather Service, the Pacific Marine Environmental Laboratory, the National Geophysical Data Center, and the National Data Buoy Center depends on rapid isolation of a deep-ocean tsunami signal during tsunami propagation. Typical tsunami signal-to-noise ratios in the deep-ocean are such that de-tiding based on a combination of standard tidal harmonic predictions and carefully constructed filters are necessary to isolate the tsunami from records dominated by local tides and environmentally induced background noise. The unprecedented amplitudes measured at deep-ocean tsunameter sites offshore Japan during the propagation phase of the 11 March 2011 Tohoku tsunami provide an atypical scenario of high signal-to-noise ratios by which to evaluate the historic nature of this tsunami in terms of signal isolation for the forecasting of tsunami amplitude and inundation along Pacific Basin coastlines. Tsunami isolation for real-time forecasting during the more typical event scenarios of 27 February 2010 Chile and 29 September 2009 Samoa require specific techniques to minimize impact on the tsunami signal.
{"title":"Signal-to-noise ratio and the isolation of the 11 March 2011 Tohoku tsunami in deep-ocean tsunameter records","authors":"M. Eblé, V. Titov, G. Mungov, C. Moore, D. Denbo, R. Bouchard","doi":"10.23919/OCEANS.2011.6107288","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107288","url":null,"abstract":"The United States National Oceanic and Atmospheric Administration tsunami forecasting capability under collaborative development between the National Weather Service, the Pacific Marine Environmental Laboratory, the National Geophysical Data Center, and the National Data Buoy Center depends on rapid isolation of a deep-ocean tsunami signal during tsunami propagation. Typical tsunami signal-to-noise ratios in the deep-ocean are such that de-tiding based on a combination of standard tidal harmonic predictions and carefully constructed filters are necessary to isolate the tsunami from records dominated by local tides and environmentally induced background noise. The unprecedented amplitudes measured at deep-ocean tsunameter sites offshore Japan during the propagation phase of the 11 March 2011 Tohoku tsunami provide an atypical scenario of high signal-to-noise ratios by which to evaluate the historic nature of this tsunami in terms of signal isolation for the forecasting of tsunami amplitude and inundation along Pacific Basin coastlines. Tsunami isolation for real-time forecasting during the more typical event scenarios of 27 February 2010 Chile and 29 September 2009 Samoa require specific techniques to minimize impact on the tsunami signal.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"48 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73054233","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107042
Jasmine B. D. Jaffrés, M. Heron
The impact of waves on the environment (e.g. erosion) and industries (incl. shipping and tourism) can be very significant. Here, we are presenting analysis of coastal wave data in the southern Great Barrier Reef (GBR), Australia, using a combination of observational data (HF radar) and a numerical wave model (WaveWatch3). The modeled significant wave height fields compare reasonably well with those obtained from the radar stations, inducing confidence in the two datasets. The radar-produced wave fields are spatially more variable compared to the model results, linked to the influence of wind stress resolution and currents in accurately determining wave characteristics.
{"title":"Wave climate in the Southern Great Barrier Reef, Australia - Evaluation of an ocean HF radar system and WaveWatch3","authors":"Jasmine B. D. Jaffrés, M. Heron","doi":"10.23919/OCEANS.2011.6107042","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107042","url":null,"abstract":"The impact of waves on the environment (e.g. erosion) and industries (incl. shipping and tourism) can be very significant. Here, we are presenting analysis of coastal wave data in the southern Great Barrier Reef (GBR), Australia, using a combination of observational data (HF radar) and a numerical wave model (WaveWatch3). The modeled significant wave height fields compare reasonably well with those obtained from the radar stations, inducing confidence in the two datasets. The radar-produced wave fields are spatially more variable compared to the model results, linked to the influence of wind stress resolution and currents in accurately determining wave characteristics.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"200 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77724193","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107117
M. Sangekar, B. Thornton, T. Nakatani, A. Bodenmann, T. Sakamaki, T. Ura
The autonomous underwater vehicle has proven to be an important tool for study of the seafloor. Detailed seafloor analysis often requires wide area observations with high resolution information. Certain sensors require close proximity to the seafloor or contact, with stable footing to perform integrated measurements over a period of time. Such wide area high resolution surveys cannot be performed by a cruising or hovering type vehicle alone. In this research the authors propose a new class of AUV along with a survey technique in which an underwater vehicle can generate meter order resolution wide area maps of the seafloor, but at intermediate locations, obtain higher, centimeter order resolution information by lowering scanning speed and altitude and finally, by landing to obtain micrometer order resolution measurements or to perform integrated measurements at the same position. A new underwater vehicle with slight negative buoyancy has been developed which has hardware and software to perform landing on the seafloor. Since the seafloor can change abruptly and at short intervals, the reliability and functioning of such technology requires real-time seafloor classification for detection of suitable landing sites. A landing algorithm has been developed which uses laser profile data to calculate a landing vector coordinate for safe landing in realtime and this has been implemented on a newly developed landing vehicle. An autonomous landing system has been developed which uses this algorithm to perform landing operations. Experiments were conducted at a tank facility to demonstrate real-time computation of the landing algorithm and autonomous landing of the vehicle using the proposed system. Results from the landing experiments conducted are presented in this paper.
{"title":"Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation","authors":"M. Sangekar, B. Thornton, T. Nakatani, A. Bodenmann, T. Sakamaki, T. Ura","doi":"10.23919/OCEANS.2011.6107117","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107117","url":null,"abstract":"The autonomous underwater vehicle has proven to be an important tool for study of the seafloor. Detailed seafloor analysis often requires wide area observations with high resolution information. Certain sensors require close proximity to the seafloor or contact, with stable footing to perform integrated measurements over a period of time. Such wide area high resolution surveys cannot be performed by a cruising or hovering type vehicle alone. In this research the authors propose a new class of AUV along with a survey technique in which an underwater vehicle can generate meter order resolution wide area maps of the seafloor, but at intermediate locations, obtain higher, centimeter order resolution information by lowering scanning speed and altitude and finally, by landing to obtain micrometer order resolution measurements or to perform integrated measurements at the same position. A new underwater vehicle with slight negative buoyancy has been developed which has hardware and software to perform landing on the seafloor. Since the seafloor can change abruptly and at short intervals, the reliability and functioning of such technology requires real-time seafloor classification for detection of suitable landing sites. A landing algorithm has been developed which uses laser profile data to calculate a landing vector coordinate for safe landing in realtime and this has been implemented on a newly developed landing vehicle. An autonomous landing system has been developed which uses this algorithm to perform landing operations. Experiments were conducted at a tank facility to demonstrate real-time computation of the landing algorithm and autonomous landing of the vehicle using the proposed system. Results from the landing experiments conducted are presented in this paper.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"77 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82484265","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6106902
R. J. Barton, Geoffrey R. Moss, Kevin B. Smith
In this study, the properties of the scattered acoustic vector fields generated by a simple rigid motionless sphere and cylinder are investigated. Analytical solutions are derived from general acoustic pressure scattering models, and analyzed for wave numbers in the resonance region. The separable active and reactive components of the acoustic intensity are used to investigate the structural features of the scattered field components. The ability to extract scattered field features is illustrated with measurements obtained from in-air experiments using an anechoic chamber and acoustic intensity probes to measure the scattered acoustic vector field resulting from continuous plane wave illumination.
{"title":"Scattered acoustic intensity field measurements of a rigid motionless sphere and cylinder","authors":"R. J. Barton, Geoffrey R. Moss, Kevin B. Smith","doi":"10.23919/OCEANS.2011.6106902","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6106902","url":null,"abstract":"In this study, the properties of the scattered acoustic vector fields generated by a simple rigid motionless sphere and cylinder are investigated. Analytical solutions are derived from general acoustic pressure scattering models, and analyzed for wave numbers in the resonance region. The separable active and reactive components of the acoustic intensity are used to investigate the structural features of the scattered field components. The ability to extract scattered field features is illustrated with measurements obtained from in-air experiments using an anechoic chamber and acoustic intensity probes to measure the scattered acoustic vector field resulting from continuous plane wave illumination.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"63 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81365280","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107244
J. Newton, J. Apple
Students from Native American tribes in the Pacific Northwest United States are under-represented in ocean studies despite tribes' strong cultural ties to the sea for thousands of years. Tribes with lands bordering seawater and who currently use this environment are numerous in the Puget Sound region. Yet entrainment of tribal students into ocean sciences higher education is lacking. Through efforts that span and integrate several programs, we have initiated several successful practices to understand and break through some of the barriers to improve this status. Some solutions are quite straightforward, but not obvious if Native American cultural awareness is not appreciated. One highly successful practice has been use of peer-to-peer knowledge transfer. We have also found that including sampling over the full spectrum of the pelagic ecosystem has been successful. Native American students and their communities are attracted to this work because the data are ecosystem inclusive (water to whales), the content is place-based, and the learning environment focuses on an experiential, student-led, inquiry-based approach - all of which resonate with the Native culture. The utility of this perspective as a contribution to STEM research is obvious. We seek to share our lessons learned with the ocean community to foster a wider and more diverse participation in ocean science.
{"title":"The value of peer-to-peer knowledge transfer for engaging pacific northwest tribes in stem education and oceanographic studies","authors":"J. Newton, J. Apple","doi":"10.23919/OCEANS.2011.6107244","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107244","url":null,"abstract":"Students from Native American tribes in the Pacific Northwest United States are under-represented in ocean studies despite tribes' strong cultural ties to the sea for thousands of years. Tribes with lands bordering seawater and who currently use this environment are numerous in the Puget Sound region. Yet entrainment of tribal students into ocean sciences higher education is lacking. Through efforts that span and integrate several programs, we have initiated several successful practices to understand and break through some of the barriers to improve this status. Some solutions are quite straightforward, but not obvious if Native American cultural awareness is not appreciated. One highly successful practice has been use of peer-to-peer knowledge transfer. We have also found that including sampling over the full spectrum of the pelagic ecosystem has been successful. Native American students and their communities are attracted to this work because the data are ecosystem inclusive (water to whales), the content is place-based, and the learning environment focuses on an experiential, student-led, inquiry-based approach - all of which resonate with the Native culture. The utility of this perspective as a contribution to STEM research is obvious. We seek to share our lessons learned with the ocean community to foster a wider and more diverse participation in ocean science.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"37 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84124642","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107155
J. Liou
Transient force and torque on a small Autonomous Underwater Vehicle (AUV) traversing underneath a sailing ship in deep water are quantified under idealized conditions. This study represents the ship's hull and the flow field by the lower half of the flow field associated with an axial symmetric Rankine oval. The AUV has a semi-spherical nose cone, a cylindrical body, a tapered section, and a tail-cone. Connected to the underside of the AUV is a magnetometer. The AUV and the magnetometer are represented by a two dimensional body with a profile that matches that of the AUV and the magnetometer. The flow field experienced by the AUV is essentially two dimensional and is modeled as such. Assuming potential flow with infinite extent, a panel method is used to obtain the tangential velocities on the AUV and magnetometer surfaces. Dynamic pressures at these surfaces are found using the unsteady Bernoulli equation. The force and torque are then computed. Rapid changes of these hydrodynamic loads as the AUV passes under the bow and the stern of the ship are demonstrated.
{"title":"AUV hydrodynamics for survivability and controllability","authors":"J. Liou","doi":"10.23919/OCEANS.2011.6107155","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107155","url":null,"abstract":"Transient force and torque on a small Autonomous Underwater Vehicle (AUV) traversing underneath a sailing ship in deep water are quantified under idealized conditions. This study represents the ship's hull and the flow field by the lower half of the flow field associated with an axial symmetric Rankine oval. The AUV has a semi-spherical nose cone, a cylindrical body, a tapered section, and a tail-cone. Connected to the underside of the AUV is a magnetometer. The AUV and the magnetometer are represented by a two dimensional body with a profile that matches that of the AUV and the magnetometer. The flow field experienced by the AUV is essentially two dimensional and is modeled as such. Assuming potential flow with infinite extent, a panel method is used to obtain the tangential velocities on the AUV and magnetometer surfaces. Dynamic pressures at these surfaces are found using the unsteady Bernoulli equation. The force and torque are then computed. Rapid changes of these hydrodynamic loads as the AUV passes under the bow and the stern of the ship are demonstrated.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"42 8 Pt 2 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82861562","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107158
D. Riley, M. Beninati, M. Krane, A. Fontaine
The flow around an array of vertical solid surface mounted cylinders is characterized. These cylinders model the support structures used for a Marine Hydrokinetic (MHK) device. MHK devices extract the kinetic energy of flowing water and use it to turn an electrical generator. Array configuration is thought to contribute to performance and the amount of extractable power. For example an offset array might extract more energy than a side-by-side array. The offset array could extract more energy from the flow by having the wakes of the upstream structures funnel the incident flow, increasing kinetic energy flux onto a downstream turbine.
{"title":"Characterization of flow through an array of cylinders modeling Marine Hydrokinetic support structures","authors":"D. Riley, M. Beninati, M. Krane, A. Fontaine","doi":"10.23919/OCEANS.2011.6107158","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107158","url":null,"abstract":"The flow around an array of vertical solid surface mounted cylinders is characterized. These cylinders model the support structures used for a Marine Hydrokinetic (MHK) device. MHK devices extract the kinetic energy of flowing water and use it to turn an electrical generator. Array configuration is thought to contribute to performance and the amount of extractable power. For example an offset array might extract more energy than a side-by-side array. The offset array could extract more energy from the flow by having the wakes of the upstream structures funnel the incident flow, increasing kinetic energy flux onto a downstream turbine.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"388 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89561282","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107067
Sukmin Yoon, T. Yeu, Soung-Jea Park, Sup Hong, Sang-Bong Kim
This paper deals with an applicability of multirobot concept to deep-seabed mining system in aim of performance enhancement. From the viewpoint of mining production, a multi-miner system might be more prospective than single-miner. System characteristics of multi-miner are analyzed based on taxonomies of multi-robot to identify problems of the multi-miner and to find out proper solutions. Formations of multi-miner following mining paths are of great significance for the safe operation of miners connected with buffer, especially, in turning operations. Thus, this paper concentrates on the formation control method in turning path. Two turning methods and three formations are presented for formation control. Numerical simulations showed that strategies of diagonal formation result in good safety performance. The performance of the diagonal formation strategies are verified by experiments using three ground mobile robots.
{"title":"A study on strategy of formation control for multi-miner in turning operation","authors":"Sukmin Yoon, T. Yeu, Soung-Jea Park, Sup Hong, Sang-Bong Kim","doi":"10.23919/OCEANS.2011.6107067","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107067","url":null,"abstract":"This paper deals with an applicability of multirobot concept to deep-seabed mining system in aim of performance enhancement. From the viewpoint of mining production, a multi-miner system might be more prospective than single-miner. System characteristics of multi-miner are analyzed based on taxonomies of multi-robot to identify problems of the multi-miner and to find out proper solutions. Formations of multi-miner following mining paths are of great significance for the safe operation of miners connected with buffer, especially, in turning operations. Thus, this paper concentrates on the formation control method in turning path. Two turning methods and three formations are presented for formation control. Numerical simulations showed that strategies of diagonal formation result in good safety performance. The performance of the diagonal formation strategies are verified by experiments using three ground mobile robots.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"74 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80817853","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107026
M. Ueno, Hideki Miyazaki, H. Taguchi, Y. Kitagawa, Y. Tsukada
The all-round wave generator, a model ship with a cargo shift simulator, and the carriage system tracking the model ship reproduced a phenomenon occurred to a fast ferry at an actual directional sea; a large roll motion and subsequent cargo collapse in a following sea condition. The all-round wave generator consisting 382 segments surrounding the whole periphery of the basin successfully reproduced the estimated directional wave field in the model scale. The analytical calculation clarified the estimated directional wave field and the corresponding encounter wave properties. A small concentrating wave triggered the first large roll motion that induced the cargo shift and then lead to the larger roll and yaw motion. Other motion data such as pitch angle and drift angle revealed how the fast ferry respond to the successive large quartering waves.
{"title":"Reproduction of an actual sea and ship motion using the all-round wave generator","authors":"M. Ueno, Hideki Miyazaki, H. Taguchi, Y. Kitagawa, Y. Tsukada","doi":"10.23919/OCEANS.2011.6107026","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107026","url":null,"abstract":"The all-round wave generator, a model ship with a cargo shift simulator, and the carriage system tracking the model ship reproduced a phenomenon occurred to a fast ferry at an actual directional sea; a large roll motion and subsequent cargo collapse in a following sea condition. The all-round wave generator consisting 382 segments surrounding the whole periphery of the basin successfully reproduced the estimated directional wave field in the model scale. The analytical calculation clarified the estimated directional wave field and the corresponding encounter wave properties. A small concentrating wave triggered the first large roll motion that induced the cargo shift and then lead to the larger roll and yaw motion. Other motion data such as pitch angle and drift angle revealed how the fast ferry respond to the successive large quartering waves.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"97 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78044271","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 : 2011-12-19DOI: 10.23919/OCEANS.2011.6107272
O. Midtgaard, R. Hansen, T. O. Saebo, V. Myers, J. Dubberley, I. Quidu
In April of 2011, FFI led a sea trial near Larvik, Norway on FFIs research vessel the H.U. Sverdrup II with participation by representatives from Canada, United States, and France. One objective of the sea trial was to acquire a data set suitable for examining incoherent and coherent change detection and automated target recognition (ATR) algorithms applied to Synthetic Aperture Sonar (SAS) imagery. The end goal is to produce an automated tool for detecting recently placed objects on the seafloor. To test these algorithms two areas were chosen, one with a comparatively benign seafloor and one with a boulder strewn complex seafloor. Each area was surveyed before and after deployment of objects. The survey time intervals varied from two days to eight days. In this paper we present the trial and show examples of SAS images and change detection of the images.
{"title":"Change detection using Synthetic Aperture Sonar: Preliminary results from the Larvik trial","authors":"O. Midtgaard, R. Hansen, T. O. Saebo, V. Myers, J. Dubberley, I. Quidu","doi":"10.23919/OCEANS.2011.6107272","DOIUrl":"https://doi.org/10.23919/OCEANS.2011.6107272","url":null,"abstract":"In April of 2011, FFI led a sea trial near Larvik, Norway on FFIs research vessel the H.U. Sverdrup II with participation by representatives from Canada, United States, and France. One objective of the sea trial was to acquire a data set suitable for examining incoherent and coherent change detection and automated target recognition (ATR) algorithms applied to Synthetic Aperture Sonar (SAS) imagery. The end goal is to produce an automated tool for detecting recently placed objects on the seafloor. To test these algorithms two areas were chosen, one with a comparatively benign seafloor and one with a boulder strewn complex seafloor. Each area was surveyed before and after deployment of objects. The survey time intervals varied from two days to eight days. In this paper we present the trial and show examples of SAS images and change detection of the images.","PeriodicalId":19442,"journal":{"name":"OCEANS'11 MTS/IEEE KONA","volume":"49 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82518266","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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