Europe Oceans 2005最新文献_第4页

Combined parametric synthetic and interferometric sonar for the detection of buried objects 参数合成声纳与干涉声纳相结合的地埋目标探测

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511769

M. Zakharia, C. Pollet, E. Rigaud

{"title":"Combined parametric synthetic and interferometric sonar for the detection of buried objects","authors":"M. Zakharia, C. Pollet, E. Rigaud","doi":"10.1109/OCEANSE.2005.1511769","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1511769","url":null,"abstract":"Both parametric and synthetic aperture sonar can provide low frequency and high resolution \"virtual arrays\" either thanks to the medium nonlinearity (parametric) or to extra processing including sonar platform trajectory (SAS). They can thus be relevant tools for the detection of buried objects (need of low frequency for bottom penetration) with a \"reasonably sized\" array. The SITAR project is an EC funded project for the detection and characterization of buried waste in the Baltic Sea. It requires an acoustic tool for area surveys and detection of \"suspicious zones\". In this framework, both parametric and synthetic aperture techniques were used concurrently in order to get the best resolution for both bottom and subbottom images. A prototype of parametric SAS has been developed in this project and tested in tank and at sea. The primary frequencies of the prototype are around 100 kHz leading to a secondary one ranging from 10 to 20 kHz. The difference in penetration (between primaries and secondary frequency ranges) is used to discriminate proud from buried targets. Two lines of receiving array were used in order to provide SAS interferometric mapping. Six SAS images and three maps were thus obtained from the same spot, at the same time and with comparable resolution (two high frequency images and a low frequency one for both top and bottom arrays). After a presentation of the prototype and of the experiments, this paper will concentrate on processed images obtained at sea and on the understanding of the physical phenomena involved (in particular their frequency dependence) in order to identify buried objects.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116848031","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: 5

Ultra short baseline acoustic receiver/processor 超短基线声学接收机/处理器

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513262

F. Jaffré, T. Austin, B. Allen, R. Stokey, C. von Alt

引用次数: 20

Operational satellite monitoring of oil spill pollution in the southeastern Baltic Sea 波罗的海东南部石油泄漏污染的操作卫星监测

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511706

A. Kostianoy, K. Litovchenko, S. Lebedev, S. Stanichny, D. Soloviev, O. Pichuzhkina

{"title":"Operational satellite monitoring of oil spill pollution in the southeastern Baltic Sea","authors":"A. Kostianoy, K. Litovchenko, S. Lebedev, S. Stanichny, D. Soloviev, O. Pichuzhkina","doi":"10.1109/OCEANSE.2005.1511706","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1511706","url":null,"abstract":"Shipping activities in the Baltic Sea, including oil transport and oil handled in harbors, have a number of negative impacts on the marine environment and coastal zone. Oil spills cause the contamination of seawater, shores, and beaches, which may persist for several months and represent a threat to marine resources. One of the main tasks in the ecological monitoring of the Baltic Sea is an operational satellite and aerial detection of oil spillages, determination of their characteristics, establishment of the pollution sources and forecast of probable trajectories of the oil spill transport. In June 2003 LUKOIL-Kaliningradmorneft initiated a pilot project, aimed to the complex monitoring of the southeastern Baltic Sea, in connection with a beginning of oil production at continental shelf of Russia in March 2004. Since June 2004 the operational monitoring was performed on the base of daily satellite remote sensing (AVHRR NOAA, MODIS, TOPEX/Poseidon, Jason-1, ENVISAT ASAR imagery) of SST, sea level, chlorophyll concentration, mesoscale dynamics, wind and waves, and oil spills. 110 oil spills have been detected in the time period between June 2004 and March 2005. Some of the results of a complex approach to the ongoing monitoring of the southeastern Baltic Sea devoted, basically, to the oil spills detection by means of ASAR ENVISAT data and forecast of probable trajectories of the oil spill transport based on the interactive numerical model Seatrack Web are discussed.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128654850","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

Common issues between cabled and non cabled observatories in ASSEM project ASSEM项目中有线和非有线天文台之间的常见问题

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513171

J. Rolin, J. Blandin, V. Lykousis, J. Strout, G. Etiope, P. Favali, P. Briole, V. Ballu, G. Papatheodorou, G. Ferentinos, D. Cathy, M. Masson

引用次数: 1

Estimating layover in broadband synthetic aperture sonar bathymetry 宽带合成孔径声纳测深中停留时间估计

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513206

M.H. Hayes, A. Hunter, P. Barclay, P. Gough

引用次数: 4

Object detection at different resolution in archaeological side-scan sonar images 考古侧扫声纳图像中不同分辨率的目标检测

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511727

L. Atallah, C. Shang, R. Bates

引用次数: 15

An improvement of the discriminating capability of the active sonar by optimization of a criterion based on the Cramer-Rao lower bound 基于Cramer-Rao下界准则的优化，提高了主动声纳的识别能力

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513159

C. Fraschini, F. Chaillan, P. Courmontagne

引用次数: 4

Underwater volcano observation by autonomous underwater vehicle "r2D4" 自主水下航行器“r2D4”水下火山观测

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511775

K. Nasahashi, T. Ura, A. Asada, T. Obara, T. Sakamaki, K. Kim, K. Okamura

{"title":"Underwater volcano observation by autonomous underwater vehicle \"r2D4\"","authors":"K. Nasahashi, T. Ura, A. Asada, T. Obara, T. Sakamaki, K. Kim, K. Okamura","doi":"10.1109/OCEANSE.2005.1511775","DOIUrl":"https://doi.org/10.1109/OCEANSE.2005.1511775","url":null,"abstract":"Based on the successes in development and field operations of AUV \"R-One Robot\", the Underwater Technology Research Center at the University of Tokyo established a five year project for a next generation long-range cruising type AUV from 2001, an AUV named \"r2D4\". The primary mission for \"r2D4\" is a survey of an undersea hydrothermal vent area. Construction of the hardware system as well as the primary software system were completed in July 2003. Special features of \"r2D4\" are the following: (1) Compact size and lightweight (length overall: 4.4 m, weight: 1,600 kg). (2) Operating max depth 4,000 m. (3) Highly accurate positioning by the combined instrumentation of fiber optic gyroscope and Doppler sonar. (4) \"r2D4\" has superior recognition ability on the complicated underwater environments transition by multiple sensor. (5) Adaptive path replanning ability for the observation. If the vehicle finds a suspicious place or an object in underwater space, it can regenerate the target path dynamically in order to make this observation. After the observation at Ryotsu Bay in the Sea of Japan and Kurosima knoll off Ishigaki Island, \"r2D4\" investigated the undersea hydrothermal vents at the area of Mariana Trough in June 2004. We succeeded in the observation of the plume from the undersea hydrothermal vents at NW Rota 1 Underwater Volcano with multiple sensor and still camera. We present the outline of the new AUV \"r2D4\" and the results of the survey.","PeriodicalId":120840,"journal":{"name":"Europe Oceans 2005","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130915080","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: 13

A coordinate descent algorithm for multichannel multiuser detection in underwater acoustic DS-CDMA systems 水声DS-CDMA系统中多通道多用户检测的坐标下降算法

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1511715

E.C. Page, M. Stojanovic

引用次数: 1

Multiresolution analysis of SAS images SAS图像的多分辨率分析

Europe Oceans 2005 Pub Date : 2005-06-20 DOI: 10.1109/OCEANSE.2005.1513216

F. Chaillan, C. Fraschini, P. Courmontagne, M. Amate

引用次数: 7