Pub Date : 2001-11-05DOI: 10.1109/OCEANS.2001.968418
A. Arakelyan, A.K. Hambaryan, A. K. Arakelian
A concept for combining of data of scatterometric and dual polarization radiometer observations is presented. Mmicrowave, combined active-passive method for detection and identification of sea surface anomalous formations (signatures) is described, originated due to separate changes of such parameters as: the wind speed, the sea state in the form of swell or long wave spectrum characteristics, air and water temperatures, characteristics of foam formations, etc. A block diagram of combined radar-radiometer detector-identifier is described, as well as the samples of sea surface radar-radiometer images are presented.
{"title":"Effectiveness of spatial-temporal collocated microwave scatterometric and vertical-horizontal polarized radiometric images in sea surface monitoring","authors":"A. Arakelyan, A.K. Hambaryan, A. K. Arakelian","doi":"10.1109/OCEANS.2001.968418","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968418","url":null,"abstract":"A concept for combining of data of scatterometric and dual polarization radiometer observations is presented. Mmicrowave, combined active-passive method for detection and identification of sea surface anomalous formations (signatures) is described, originated due to separate changes of such parameters as: the wind speed, the sea state in the form of swell or long wave spectrum characteristics, air and water temperatures, characteristics of foam formations, etc. A block diagram of combined radar-radiometer detector-identifier is described, as well as the samples of sea surface radar-radiometer images are presented.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130815261","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968404
F.-X. Espiau, P. Rives
In this paper, we discuss of the classical problem of the reconstruction of natural scenes, but in our case for the non-structured and underwater ones. Using an uncalibrated single camera, we propose to describe a method to firstly, extract robust and stable features based on a multi scale approach, and secondly to reconstruct a 3D projective model of the scene.
{"title":"Extracting robust features and 3D reconstruction in underwater images","authors":"F.-X. Espiau, P. Rives","doi":"10.1109/OCEANS.2001.968404","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968404","url":null,"abstract":"In this paper, we discuss of the classical problem of the reconstruction of natural scenes, but in our case for the non-structured and underwater ones. Using an uncalibrated single camera, we propose to describe a method to firstly, extract robust and stable features based on a multi scale approach, and secondly to reconstruct a 3D projective model of the scene.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"93 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127984168","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968421
A.E. Kontar
Environmental problems in the Black Sea continue to be serious, even though governments have initiated a regional approach to the management and protection of the marine environment. Following the Chernobyl accident in 1986, the Black Sea riparian countries (viz., Bulgaria, Georgia, Romania, Russia, Turkey, and Ukraine) identified radioactive pollution as a serious problem. This paper presents some results of the project which is part of the fundamental research carried out by the P.P.Shirshov Institute of Oceanology of the Russian Academy of Sciences. The aim of the project is to develop the policy and methods for assessing the fate of the Chernobyl radionuclides in the Black Sea. The author sought to incorporate the study of different oceanographic hydrodynamic models to develop an international approach to the problems of measurement and prediction of sea pollution, combining methods of geoecological monitoring and comparative analysis of techniques used in oceanography for assessing marine environmental contamination. Using these results an ecological policy was formulated and recommendations were made for minimizing the negative effect of contamination on the marine environment. Different models were developed to perform further investigations of the hydro-dynamically dominated processes of the fate of radionuclides and other contaminants in the Black Sea. For example, a 3-D hybrid flow/transport model was developed to predict the dynamics of the Black Sea related to the dispersal of pollution. The transport module of this model takes predetermined current data and uses Lagrangian tracking to predict the motion of individual particles, the sum of which constitute a hypothetical plume. Currents used in the model were generated by the high resolution, low-dissipative numerical circulation model, DieCast, which was implemented for the Black Sea. The hybrid model may be implemented for velocity, temperature and salinity fields and it can simulate continuous releases of different tracers (radionuclides, oil) in the coastal waters of the Black Sea. A hydrophysical model based on quasi geostrophical approach and data of the observation of radioactive products after the Chernobyl accident was created and used for study of dynamic and mixing processes in the Black Sea. The models show an increased level of radionuclides in the stable zones of the cyclonic and anticyclonic circulation. Such zones, with 10-15% more /sup 137/Cs, were noted south of the Crimea and in the south/western part of the Black Sea. Horizontal scales of these zones were 80-120 km.
{"title":"Development of ecological policy, assessment and prediction of the fate of Chernobyl radionuclides in sediments of the Black Sea","authors":"A.E. Kontar","doi":"10.1109/OCEANS.2001.968421","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968421","url":null,"abstract":"Environmental problems in the Black Sea continue to be serious, even though governments have initiated a regional approach to the management and protection of the marine environment. Following the Chernobyl accident in 1986, the Black Sea riparian countries (viz., Bulgaria, Georgia, Romania, Russia, Turkey, and Ukraine) identified radioactive pollution as a serious problem. This paper presents some results of the project which is part of the fundamental research carried out by the P.P.Shirshov Institute of Oceanology of the Russian Academy of Sciences. The aim of the project is to develop the policy and methods for assessing the fate of the Chernobyl radionuclides in the Black Sea. The author sought to incorporate the study of different oceanographic hydrodynamic models to develop an international approach to the problems of measurement and prediction of sea pollution, combining methods of geoecological monitoring and comparative analysis of techniques used in oceanography for assessing marine environmental contamination. Using these results an ecological policy was formulated and recommendations were made for minimizing the negative effect of contamination on the marine environment. Different models were developed to perform further investigations of the hydro-dynamically dominated processes of the fate of radionuclides and other contaminants in the Black Sea. For example, a 3-D hybrid flow/transport model was developed to predict the dynamics of the Black Sea related to the dispersal of pollution. The transport module of this model takes predetermined current data and uses Lagrangian tracking to predict the motion of individual particles, the sum of which constitute a hypothetical plume. Currents used in the model were generated by the high resolution, low-dissipative numerical circulation model, DieCast, which was implemented for the Black Sea. The hybrid model may be implemented for velocity, temperature and salinity fields and it can simulate continuous releases of different tracers (radionuclides, oil) in the coastal waters of the Black Sea. A hydrophysical model based on quasi geostrophical approach and data of the observation of radioactive products after the Chernobyl accident was created and used for study of dynamic and mixing processes in the Black Sea. The models show an increased level of radionuclides in the stable zones of the cyclonic and anticyclonic circulation. Such zones, with 10-15% more /sup 137/Cs, were noted south of the Crimea and in the south/western part of the Black Sea. Horizontal scales of these zones were 80-120 km.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126212117","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968688
J. Rish, S. Willcox, R. Grieve, I. Montieth, J. Vaganay
The Battlespace Preparation Autonomous Underwater Vehicles (BPAUV) were developed under the sponsorship of the Office of Naval Research (ONR) to support development of underwater survey applications in the shallow water (12-91 in (40-300 feet)) and, to some extent, very shallow water (3-12 in (10-40 feet)) regions of the littoral environment. A primary function of this system is to evaluate techniques and technologies for bottom mapping/environmental survey and shallow water mine hunting. Two of these systems were built and each equipped with a Klein 5000 sidescan sonar, a CTD, a miniature fluorometer, and a tight scattering sensor; enabling the collection of the basic environmental data needed to characterize a given area. Initial field trials and a recent field demonstration provided opportunities to examine different dive profiles, evaluate navigational performance and survey capabilities, and evaluate the operator-vehicle interface. This paper includes a discussion of the BPAUV concept, some of the key issues associated with the development of the vehicle, and results generated during the testing and demonstration process.
{"title":"Operational testing of the Battlespace Preparation AUV in the shallow water regime","authors":"J. Rish, S. Willcox, R. Grieve, I. Montieth, J. Vaganay","doi":"10.1109/OCEANS.2001.968688","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968688","url":null,"abstract":"The Battlespace Preparation Autonomous Underwater Vehicles (BPAUV) were developed under the sponsorship of the Office of Naval Research (ONR) to support development of underwater survey applications in the shallow water (12-91 in (40-300 feet)) and, to some extent, very shallow water (3-12 in (10-40 feet)) regions of the littoral environment. A primary function of this system is to evaluate techniques and technologies for bottom mapping/environmental survey and shallow water mine hunting. Two of these systems were built and each equipped with a Klein 5000 sidescan sonar, a CTD, a miniature fluorometer, and a tight scattering sensor; enabling the collection of the basic environmental data needed to characterize a given area. Initial field trials and a recent field demonstration provided opportunities to examine different dive profiles, evaluate navigational performance and survey capabilities, and evaluate the operator-vehicle interface. This paper includes a discussion of the BPAUV concept, some of the key issues associated with the development of the vehicle, and results generated during the testing and demonstration process.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122200807","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968141
Jaeyoung Lee, Keh-Han Wang
A marine pipeline laid on the ocean floor, without burial, is exposed to current and wave induced hydrodynamic forces. If the pipeline does not have enough submerged weight to resist the hydrodynamic forces, the pipeline will be unstable, moving up and down (due to lifting force) and back and forth (due to drag and inertia force). The excessive pipe movement and oscillatory motions may cause high stress and fatigue damage to the pipe. In the past, the on-bottom stability of a pipeline under oblique waves was calculated by reducing the hydrodynamic forces due to the oblique wave angle. However, this approach gives a conservative result. In reality, a pipeline at an oblique wave angle is exposed to positive (at wave crest) and negative (at wave trough) forces, simultaneously. The counter forces will act like an anchor and keep the pipeline from moving. This paper describes how the oblique wave angle affects the marine pipeline laid on the ocean floor. The anchoring effect due to the oblique wave angle is presented.
{"title":"Stability of pipeline under oblique waves","authors":"Jaeyoung Lee, Keh-Han Wang","doi":"10.1109/OCEANS.2001.968141","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968141","url":null,"abstract":"A marine pipeline laid on the ocean floor, without burial, is exposed to current and wave induced hydrodynamic forces. If the pipeline does not have enough submerged weight to resist the hydrodynamic forces, the pipeline will be unstable, moving up and down (due to lifting force) and back and forth (due to drag and inertia force). The excessive pipe movement and oscillatory motions may cause high stress and fatigue damage to the pipe. In the past, the on-bottom stability of a pipeline under oblique waves was calculated by reducing the hydrodynamic forces due to the oblique wave angle. However, this approach gives a conservative result. In reality, a pipeline at an oblique wave angle is exposed to positive (at wave crest) and negative (at wave trough) forces, simultaneously. The counter forces will act like an anchor and keep the pipeline from moving. This paper describes how the oblique wave angle affects the marine pipeline laid on the ocean floor. The anchoring effect due to the oblique wave angle is presented.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116131478","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968036
P. Stein, J. Rudzinsky, M. Binnam, W. Ellison, J. Johnson
The High Frequency Marine Mammal Mitigation (HF/M3) sonar system was specifically designed to meet the marine mammal mitigation plan proposed by the Surveillance Towed Array Sensor System Low Frequency Active (SURTASS LFA) Draft Environmental Impact Statement. The system is integral with the SURTASS LFA, residing at the top of the vertical transmit array, utilizes PC based processing and control, and is comprised primarily of commercial off-the-shelf (COTS) components. The HF/M3 is an active sonar operating in the 30-40 kHz frequency range. The system utilizes four independent transponders mounted on a rotating carousel. Each transponder consists of an omni-directional hydrophone located at the focal point of a 12"/spl times/18" air-backed, parabolic reflector. The reflector provides for an on-axis transmit and receive directivity factor of 20-25 dB to depths of 1000 ft. The system has been tested in numerous field trials, where its ability to detect marine mammals of various size has been qualitatively verified. Quantitative performance estimates, generated using empirical interference and target echo models, suggest that a single, moderately-sized (/spl sim/5 m in length) marine mammal swimming radially toward the system has less than a 1 in 1000 chance of penetrating the LFA's designated 180 dB re /spl mu/ Pa/sup 2/ isoplath.
高频海洋哺乳动物缓解(HF/M3)声纳系统是专门为满足监测拖曳阵列传感器系统低频主动(SURTASS LFA)环境影响声明草案中提出的海洋哺乳动物缓解计划而设计的。该系统与SURTASS LFA集成在一起，位于垂直传输阵列的顶部，利用基于PC的处理和控制，主要由商用现货(COTS)组件组成。HF/M3是一种主动声纳，工作在30-40 kHz频率范围内。该系统利用四个独立的应答器安装在一个旋转的传送带上。每个应答器都由一个全向水听器组成，该水听器位于一个12“/spl倍/18”气背抛物面反射器的焦点上。反射器提供了20-25 dB的轴向发射和接收指向性因子，深度可达1000英尺。该系统已经在许多现场试验中进行了测试，其检测各种大小海洋哺乳动物的能力已经得到了定性验证。使用经验干扰和目标回波模型生成的定量性能估计表明，单个中等大小(/spl sim/5米长)的海洋哺乳动物向系统径向游泳，穿透LFA指定的180 dB re /spl mu/ Pa/sup 2/等平面的机会不到千分之一。
{"title":"High frequency marine mammal mitigation active sonar system","authors":"P. Stein, J. Rudzinsky, M. Binnam, W. Ellison, J. Johnson","doi":"10.1109/OCEANS.2001.968036","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968036","url":null,"abstract":"The High Frequency Marine Mammal Mitigation (HF/M3) sonar system was specifically designed to meet the marine mammal mitigation plan proposed by the Surveillance Towed Array Sensor System Low Frequency Active (SURTASS LFA) Draft Environmental Impact Statement. The system is integral with the SURTASS LFA, residing at the top of the vertical transmit array, utilizes PC based processing and control, and is comprised primarily of commercial off-the-shelf (COTS) components. The HF/M3 is an active sonar operating in the 30-40 kHz frequency range. The system utilizes four independent transponders mounted on a rotating carousel. Each transponder consists of an omni-directional hydrophone located at the focal point of a 12\"/spl times/18\" air-backed, parabolic reflector. The reflector provides for an on-axis transmit and receive directivity factor of 20-25 dB to depths of 1000 ft. The system has been tested in numerous field trials, where its ability to detect marine mammals of various size has been qualitatively verified. Quantitative performance estimates, generated using empirical interference and target echo models, suggest that a single, moderately-sized (/spl sim/5 m in length) marine mammal swimming radially toward the system has less than a 1 in 1000 chance of penetrating the LFA's designated 180 dB re /spl mu/ Pa/sup 2/ isoplath.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121146525","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968304
K. Nishimura, T. Tokuoka, Y. Ueno, Y. Sampei, S. Suzaki, S. Matsuda, S. Kubota, S. Suzuki
We have developed several new measurement systems for wide area and long-term measurement of the brackish water area (estuaries and coastal lagoons) using ultrasonic waves, optical fiber temperature sensor high-precision salinity and temperature sensors. They are (1) an underwater acoustic reflection profiling system for survey of the halocline, (2) an underwater acoustic reflection measurement system for long-term observation of halocline behavior, (3) a thermometry system using optical fiber distributed temperature sensor and (4) a CT multi-sensor temperature salinity measurement system. Long-term observations using these systems were successfully carried out in the estuaries and coastal lagoons. We are acquiring basic data for preservation and creation of the hydrosphere environment.
{"title":"Development of aquatic environment measurement systems of estuaries and coastal lagoons","authors":"K. Nishimura, T. Tokuoka, Y. Ueno, Y. Sampei, S. Suzaki, S. Matsuda, S. Kubota, S. Suzuki","doi":"10.1109/OCEANS.2001.968304","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968304","url":null,"abstract":"We have developed several new measurement systems for wide area and long-term measurement of the brackish water area (estuaries and coastal lagoons) using ultrasonic waves, optical fiber temperature sensor high-precision salinity and temperature sensors. They are (1) an underwater acoustic reflection profiling system for survey of the halocline, (2) an underwater acoustic reflection measurement system for long-term observation of halocline behavior, (3) a thermometry system using optical fiber distributed temperature sensor and (4) a CT multi-sensor temperature salinity measurement system. Long-term observations using these systems were successfully carried out in the estuaries and coastal lagoons. We are acquiring basic data for preservation and creation of the hydrosphere environment.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"27 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113942657","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968086
I. Yang, Seung-Yong Yang, Ki-Man Kim
We propose a synthetic aperture technique for a twin-line array. The towed line array system has been investigated in underwater environments to improve the signal-to-noise ratio and angular resolution. But to achieve that, it required a long aperture size. It caused physical problems-fluctuations, sensor positioning, towing array etc. It has a left-right ambiguity at the receiver between the opposite angles. To resolve these problems, we use a twin-line. It cause an angular error due to the shorter aperture size when the same number of sensors is used. To improve the signal-to-noise ratio and angular resolution we process the synthetic aperture for the twin-line. A method is presented here that synthesizes apertures in the beam domain using FFT and performs coherent processing of sub-aperture signals at successive time intervals.
{"title":"Synthetic aperture technique for twin-line array","authors":"I. Yang, Seung-Yong Yang, Ki-Man Kim","doi":"10.1109/OCEANS.2001.968086","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968086","url":null,"abstract":"We propose a synthetic aperture technique for a twin-line array. The towed line array system has been investigated in underwater environments to improve the signal-to-noise ratio and angular resolution. But to achieve that, it required a long aperture size. It caused physical problems-fluctuations, sensor positioning, towing array etc. It has a left-right ambiguity at the receiver between the opposite angles. To resolve these problems, we use a twin-line. It cause an angular error due to the shorter aperture size when the same number of sensors is used. To improve the signal-to-noise ratio and angular resolution we process the synthetic aperture for the twin-line. A method is presented here that synthesizes apertures in the beam domain using FFT and performs coherent processing of sub-aperture signals at successive time intervals.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113953716","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968134
J.A. Melhado, R. Miles, E. W. Hughes
Funded by the Center for Biomolecular Science and Engineering of the Naval Research Laboratory, Neptune Sciences, Inc (NSI) developed a system capable of quantifying the power that can be harvested from the ocean floor using fuel cells and capable of being remotely monitored and controlled using the Internet. The instrument, called the Fuel Cell Datalogger is to be deployed in max depth of 30 meters, later versions to 1500 meters. Real-time control and monitoring is possible through a 250-ft umbilical connected to a laptop on the pier that can be accessed and remotely controlled through the Internet. Anticipated use for Fuel Cell technology is self-powered underwater instrumentation. Available Internet technology is used in this system to greatly simplify remote data acquisition, control tests and disseminate data.
{"title":"The Fuel Cell experiment, merging oceanographic instrumentation with the Internet","authors":"J.A. Melhado, R. Miles, E. W. Hughes","doi":"10.1109/OCEANS.2001.968134","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968134","url":null,"abstract":"Funded by the Center for Biomolecular Science and Engineering of the Naval Research Laboratory, Neptune Sciences, Inc (NSI) developed a system capable of quantifying the power that can be harvested from the ocean floor using fuel cells and capable of being remotely monitored and controlled using the Internet. The instrument, called the Fuel Cell Datalogger is to be deployed in max depth of 30 meters, later versions to 1500 meters. Real-time control and monitoring is possible through a 250-ft umbilical connected to a laptop on the pier that can be accessed and remotely controlled through the Internet. Anticipated use for Fuel Cell technology is self-powered underwater instrumentation. Available Internet technology is used in this system to greatly simplify remote data acquisition, control tests and disseminate data.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125112680","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 : 2001-11-05DOI: 10.1109/OCEANS.2001.968754
V. Creuze, B. Jouvencel, P. Baccou
This paper presents a seabed following method for an under-actuated autonomous underwater vehicle navigating in unknown environment. Seabed following is achieved through construction of a local trajectory calculated thanks to bathymetric data given by basic sounders. Moreover, this trajectory respects the dynamic constraints of the vehicle. It is computed by using an algorithm based on simple geometric functions and interpolation curves called "semi-forced cubic splines." The bathymetric data comes from three electro-acoustic transducers situated in the front part of the vehicle. Our method has been validated with the hydrodynamic simulator of the "Taipan" vehicle, which is the autonomous underwater vehicle prototype of our laboratory. The front part of Taipan is fitted with measurement instruments. They have already been tested and results are presented.
{"title":"Seabed following for small autonomous underwater vehicles","authors":"V. Creuze, B. Jouvencel, P. Baccou","doi":"10.1109/OCEANS.2001.968754","DOIUrl":"https://doi.org/10.1109/OCEANS.2001.968754","url":null,"abstract":"This paper presents a seabed following method for an under-actuated autonomous underwater vehicle navigating in unknown environment. Seabed following is achieved through construction of a local trajectory calculated thanks to bathymetric data given by basic sounders. Moreover, this trajectory respects the dynamic constraints of the vehicle. It is computed by using an algorithm based on simple geometric functions and interpolation curves called \"semi-forced cubic splines.\" The bathymetric data comes from three electro-acoustic transducers situated in the front part of the vehicle. Our method has been validated with the hydrodynamic simulator of the \"Taipan\" vehicle, which is the autonomous underwater vehicle prototype of our laboratory. The front part of Taipan is fitted with measurement instruments. They have already been tested and results are presented.","PeriodicalId":326183,"journal":{"name":"MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125210753","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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