The Experts below are selected from a list of 3471 Experts worldwide ranked by ideXlab platform
Viola Salvatore - One of the best experts on this subject based on the ideXlab platform.
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KM3NeT Acoustic Positioning and detection System
'EDP Sciences', 2019Co-Authors: Viola SalvatoreAbstract:In the Mediterranean Sea, the KM3NeT Collaboration is constructing a the deep-sea research infrastructure hosting next generation neutrino telescopes. In the KM3NeT telescopes the Cherenkov radiation induced by the secondary charged particles produced in the interaction of cosmic and atmospheric neutrinos within an effective volume between megaton and several cubic kilometers of water are detected by an array of thousands of photomultipliers. The capability of the telescope to determine the direction of secondary charged particles and to point back to the neutrino source is strongly connected to the accuracy on photomultipliers positions. In KM3NeT, the photomultiplier positions are continuously monitored by an Acoustic Positioning System, designed by the KM3NeT Collaboration to reach an accuracy of the photomultiplier positions better than 20 cm
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15 years of Acoustic detection studies at INFN
'EDP Sciences', 2019Co-Authors: Viola Salvatore, Riccobene GiorgioAbstract:Since the early 2000s, thanks to national, regional and European projects, a number of abyssal detectors equipped with Acoustic sensors have been installed and operated by INFN in two cabled submarine research infrastructures off Eastern Sicily. The INFN’s interest in underwater Acoustics arises from the need to develop an Acoustic Positioning System for the KN3NeT telescope and to study the possibility of neutrino Acoustic detection. Theuse of innovative technologies for data acquisition and transmission Systems have enabled the first long-term studies on the deep marine environment of the Ionian Sea with a variety of lines of research. Data acquired through the INFN underwater infrastructures have allowed the continuous monitoring of the underwater Acoustic noise and several studies on cetacean species present in the area and on seismic sources . An overview of the main activities of INFN on detection and localization of underwater Acoustic sources will be presented
M Ardid - One of the best experts on this subject based on the ideXlab platform.
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the Positioning System of the antares neutrino telescope
Journal of Instrumentation, 2012Co-Authors: S Adrianmartinez, M Ageron, J A Aguilar, Al I Samarai, A Albert, M Andre, M Anghinolfi, G Anton, S Anvar, M ArdidAbstract:The ANTARES neutrino telescope, located 40km off the coast of Toulon in the Mediterranean Sea at a mooring depth of about 2475m, consists of twelve detection lines equipped typically with 25 storeys. Every storey carries three optical modules that detect Cherenkov light induced by charged secondary particles (typically muons) coming from neutrino interactions. As these lines are flexible structures fixed to the sea bed and held taut by a buoy, sea currents cause the lines to move and the storeys to rotate. The knowledge of the position of the optical modules with a precision better than 10cm is essential for a good reconstruction of particle tracks. In this paper the ANTARES Positioning System is described. It consists of an Acoustic Positioning System, for distance triangulation, and a compass-tiltmeter System, for the measurement of the orientation and inclination of the storeys. Necessary corrections are discussed and the results of the detector alignment procedure are described.
ANTARES Collaboration - One of the best experts on this subject based on the ideXlab platform.
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First results of the Instrumentation Line for the deep-sea ANTARES neutrino telescope
Astropart.Phys., 2006Co-Authors: ANTARES CollaborationAbstract:In 2005, the ANTARES Collaboration deployed and operated at a depth of 2500 m a so-called Mini Instrumentation Line equipped with Optical Modules (MILOM) at the ANTARES site. The various data acquired during the continuous operation from April to December 2005 of the MILOM confirm the satisfactory performance of the Optical Modules, their front-end electronics and readout System, as well as the calibration devices of the detector. The in-situ measurement of the Optical Module time response yields a resolution better than 0.5 ns. The performance of the Acoustic Positioning System, which enables the spatial reconstruction of the ANTARES detector with a precision of about 10 cm, is verified. These results demonstrate that with the full ANTARES neutrino telescope the design angular resolution of better than $0.3^\circ$ can be realistically achieved.
Nathan Everett - One of the best experts on this subject based on the ideXlab platform.
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Neptune: Above-Ground Storage Tank Inspection Robot System
IEEE Robotics and Automation Magazine, 1995Co-Authors: Hagen Schempf, Brian Chemel, Nathan EverettAbstract:The Neptune System is a mobile robot System used to remotely inspect above-ground storage tanks (ASTs) containing petroleum products. Neptune ascertains the state of corrosion of the floor and side-walls according to the guidelines laid out by the American Petroleum Institute (API). The robot System allows unmanned entry and sensor data collection in ASTs without the need to empty or clean the tanks nor the required human walk-through inspection. The complete System comprises: a robot crawler vehicle suitable for classified locations which carries visual and ultrasonic sensors; a deployment pod atop the tank which lowers and retrieves the crawler; an in-tank Acoustic Positioning System to chart and control the location of the robot; and an external remote control console utilizing commercial and custom software for display, planning, and control tasks. The crawler pod and navigation Systems are all designed for certification in such hazardous environments, classified as Class I, Division I, Group D
Guolei Zhu - One of the best experts on this subject based on the ideXlab platform.
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data optimization algorithm for short baseline Acoustic Positioning System based on substructure of multi element array
OCEANS 2019 - Marseille, 2019Co-Authors: Qian Cheng, Yingmin Wang, Guolei ZhuAbstract:Short baseline Acoustic Positioning System is an important technology. In order to achieve the high accuracy, the Acoustic beacon can be installed on the target, and the receiving array can be composed of multiple elements, so as to obtain redundant Positioning data for fusion. However, due to the complex underwater Acoustic environment, many disturbances may lead to the occurrence of low-reliability data objects in the Positioning data, which are called singular values. If these redundant Positioning data are not filtered, the singular-value will leading to a serious Positioning deviation. This paper proposes an algorithm called Data Optimization Algorithm for Short Baseline Acoustic Positioning System based on Substructure of Multi-element Array. In this paper, the error statistical parameters of the Positioning results in the sub-structure of the spatial array are derived firstly. Then the state of error statistical parameters is evaluated theoretically. So as to effectively identify and discard the singular-values and improve the Positioning accuracy.
