Oceans '97. MTS/IEEE Conference Proceedings最新文献_第5页

Managing oceanographic information in the military decision-making process 在军事决策过程中管理海洋信息

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.624138

J. McNitt

引用次数: 0

Global position determination and vehicle path estimation from a vision sensor for real-time video mosaicking and navigation 基于视觉传感器的实时视频拼接和导航的全局位置确定和车辆路径估计

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.634440

S. D. Fleischer, S. Rock, Richard Burton

引用次数: 34

Applications of 3-D visualizations of oceanographic data bases 海洋数据库三维可视化的应用

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.624168

M. Head, P. Luong, J.H. Costolo, K. Countryman, C. Szczechowski

{"title":"Applications of 3-D visualizations of oceanographic data bases","authors":"M. Head, P. Luong, J.H. Costolo, K. Countryman, C. Szczechowski","doi":"10.1109/OCEANS.1997.624168","DOIUrl":"https://doi.org/10.1109/OCEANS.1997.624168","url":null,"abstract":"Creative use of 2D techniques in oceanographic data analysis has proven sufficient for many tasks of analysis, review, and planning. Often, however, a greater understanding of a data set and reduced analysis time can be achieved by supplementing traditional methods with 3D visualization and display techniques. Virtual-environment visualization of 3D surfaces offers a means to review large ocean areas rapidly as a component of oceanographic data base verification and validation. For this paper, 3D temperature, salinity, and density surfaces are combined with high-resolution models of seafloor bathymetry and supplemented with retrievable alphanumeric markups such as latitudes and longitudes and point values of displayed parameters. These visualizations can enhance considerably the oceanographer's ability to detect and analyze features within the data sets. Applications to quality control of oceanographic data bases and modeled oceanographic fields are described and illustrated. Oceanographic fields for the examples are drawn from the Generalized Digital Environmental Model (GDEM) and the Modular Ocean Data Assimilation System (MODAS). Other potential applications described include sound-speed and density surfaces and oceanographic-feature displays for training, planning, and rehearsal as well as tactical displays for overall improved situational awareness. Examples presented may be viewed and navigated using electro-optical 3D eyewear in the Commander, Naval Meteorology and Oceanography Command booth.","PeriodicalId":259593,"journal":{"name":"Oceans '97. MTS/IEEE Conference Proceedings","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130644557","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}

引用次数: 12

A solar autonomous underwater vehicle system 太阳能自主水下航行器系统

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.624103

D. Blidberg, J. Jalbert, M. Ageev

引用次数: 3

Results from recent sea trials of the Underwater Digital Acoustic Telemetry system 水下数字声学遥测系统最近的海上试验结果

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.634452

S. Jarvis, R. Janiesch, K. Fitzpatrick, R. Morrissey

引用次数: 11

Global considerations for vessel traffic control and electronics navigation systems on inland waterways 内河航道船舶交通控制和电子导航系统的全球考虑

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.624160

M. J. Moroney

{"title":"Global considerations for vessel traffic control and electronics navigation systems on inland waterways","authors":"M. J. Moroney","doi":"10.1109/OCEANS.1997.624160","DOIUrl":"https://doi.org/10.1109/OCEANS.1997.624160","url":null,"abstract":"Abstract only given, as follows. The Center for Navigation at the Volpe National Transportation Systems Center has been actively involved in the study, design and development of maritime vessel traffic management systems and electronics aids for pilotage. At the outset of these activities several years ago, development projects focused on the needs of the particular inland waterway in question. These early programs resulted in some interesting breakthroughs that included the first vessel traffic management system using the Global Positioning System (GPS) on an American inland waterway. A significant byproduct of that project was the most advanced buoy positioning system in the world using GPS. Trends in system developments for vessel traffic management systems and electronics aids for pilotage have assumed global rather than insular characteristics. This paper describes how the developments on the Saint Lawrence Seaway, for example, have accelerated the development of similar systems for other waterways such as the Panama Canal. In addition, a two-pronged evolution in maritime technology is examined. First, modern day vessel tracking and pilotage systems must be constructed with a global perspective. Second, the development, or enhancement, of vessel tracking systems no longer will be acceptable without a concomitant commitment to electronics aids for pilotage.","PeriodicalId":259593,"journal":{"name":"Oceans '97. MTS/IEEE Conference Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126405094","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}

引用次数: 0

FM pulses separation for improving sub-bottom attenuation estimation 调频脉冲分离改进次底衰减估计

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.624193

A. Quinquis, E. Radoi, C. Maroni

引用次数: 1

Underwater spread-spectrum communications 水下扩频通信

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.634429

G. Loubet, V. Capellano, R. Filipiak

{"title":"Underwater spread-spectrum communications","authors":"G. Loubet, V. Capellano, R. Filipiak","doi":"10.1109/OCEANS.1997.634429","DOIUrl":"https://doi.org/10.1109/OCEANS.1997.634429","url":null,"abstract":"For low data rate communications, spread spectrum techniques can be used in the underwater medium. They fight intersymbol interference caused by multipath propagation. They have to be used if the signal-to-noise ratio (SNR) is inferior to 0 dB. They are particularly interesting for anti-jamming or discretion purposes. The low SNR technique is also resorted to in case of peak-limited energy (and long range propagation) or energy saving (immersed autonomous transmitter). We present and discuss first the method used which consists in transmitting pseudo-noise codes or 'signatures'. Binary sequences from the Gold and Kasami families were chosen to increase the data rate. In this case, the decision is taken after multi-correlation. New direct sequences of variable lengths and conceived at LETI-CEA (France) are also selected. They are particularly interesting in a multi-user environments (CDMA for example). The results obtained for two Mediterranean communications situations between a boat and the military site of Cap Ferrat (near Nice) are presented. For the last experiment, a 20-km communication was maintained for several minutes, using the new LETI 72-chip sequences, with an error rate inferior to 0.2% and a very low SNR, about -14 dB (7 bits/s). Due to close multipaths, the fading phenomenon is a delicate problem for underwater communications. To combat fading, spatial diversity seems a better solution than time or frequency diversity. Results obtained using seven receivers placed between 100 and 300 m are presented. Different combining methods were tested: selection, maximal ratio combining... . The best results were obtained using a few sensors.","PeriodicalId":259593,"journal":{"name":"Oceans '97. MTS/IEEE Conference Proceedings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121052485","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}

引用次数: 41

Development of the autonomous surface craft "ACES" 自主水面舰艇“ACES”的研制

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.624102

Justin E. Manley

{"title":"Development of the autonomous surface craft \"ACES\"","authors":"Justin E. Manley","doi":"10.1109/OCEANS.1997.624102","DOIUrl":"https://doi.org/10.1109/OCEANS.1997.624102","url":null,"abstract":"At the MIT Sea Grant College Program, Autonomous Surface Craft (ASCs) have been under development since 1993. An ASC is a small vessel outfitted with navigation and control systems which permit it to carry out functions autonomously. The first ASC developed was the ASC ARTEMIS, which was used to study command and control architectures, navigation systems, and basic data collection techniques. This vehicle successfully demonstrated the ability to operate autonomously and collect hydrographic data. ARTEMIS served well as a test platform but its small size made it unsuitable for coastal and open ocean research. Cruising speed, range, payload, and stability were all improved in the second generation ASC platform. The ASC ACES (Autonomous Coastal Exploration System) will provide better cruising speed, significantly more payload, longer mission endurance, and better seakeeping characteristics when compared to ARTEMIS. This was achieved within the primary design constraint of a 300 pound maximum weight chosen so that ACES could be easily deployed by a two member operations team. This paper describes the development of ACES. The challenge of designing a small lightweight platform with the required performance is explained and the solution implemented on ACES is described. Primary components of the design described include the hull and structural members, propulsion and power systems, and steering systems.","PeriodicalId":259593,"journal":{"name":"Oceans '97. MTS/IEEE Conference Proceedings","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253693","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}

引用次数: 76

Narrowband signal detection in a reverberation-limited environment 有限混响环境下的窄带信号检测

Oceans '97. MTS/IEEE Conference Proceedings Pub Date : 1997-10-06 DOI: 10.1109/OCEANS.1997.634330

M. Aineto, S. Lawson

引用次数: 7