EM302 Water Column Sonar Data Collected During TN315
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title: EM302 Water Column Sonar Data Collected During TN315
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date: 2014-10-22
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code: TN315_EM302
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abstract: Student Cruise (TN315, EM302)
purpose: This data is available to the public for a wide variety of uses including scientific research and analysis.
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positionName: Water Column Sonar Data Manager
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deliveryPoint: 325 Broadway, Mail Code E/NE42
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country: USA
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keyword: Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering
keyword: Earth Science > Oceans > Aquatic Sciences > Fisheries
keyword: Earth Science > Oceans > Ocean Acoustics
keyword: Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic
keyword: Earth Science > Biosphere > Ecosystems > Marine Ecosystems
keyword: Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic
keyword: Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems
keyword: Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry
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keyword: Vertical Location > Water Column
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keyword: In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
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otherConstraints: Cite as: Rolling Deck to Repository (R2R). 2014. 'EM302 Water Column Sonar Data Collected During TN315'. NOAA National Centers for Environmental Information. [access date]
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otherConstraints: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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useLimitation: These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
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language: eng; USA
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beginPosition: 2014-10-22T16:30:51
endPosition: 2014-10-30T00:30:13
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contentInfo: (MI_CoverageDescription)
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orderingInstructions: Contact the NCEI Water Column Sonar Data Manager to order data.
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name: Kongsberg EM302 water column data (.wcd) format
version: 1
specification: Kongsberg/Simrad .raw files are generated by ME70, EK60 or ES60 instruments. They contain power and optionally angular position data with each beam/frequency identified by an independent channel. See the Simrad interface specification manual for further information. The .wcd files are generated by Kongsberg EM302 or EM122 instruments. See Kongsberg documentation for more information.
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title: Kongsberg EM302 Multibeam Echosounder
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code: EM302
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code: Kongsberg EM302
type: Multibeam Echosounder
description: The state of the art 30 kHz EM 302 deep water multibeam sonar is manufactured by Kongsberg, Inc of Norway. The EM 302 transducers are modular linear arrays in a Mills cross configuration with separate units for transmit and receive. This sonar offers significantly larger swath width, increased data density and resolution. Beam focusing is applied both during reception and transmission. The system has up to 288 beams / 432 soundings per swath with pointing angles automatically adjusted according to achievable coverage or operator defined limits. In multi-ping mode, 2 swaths are generated per ping cycle, with up to 864 soundings. With multi-ping the transmit fan is duplicated and transmitted with a small difference in along track tilt. The applied tilt takes into account depth, coverage and vessel speed to give a constant sounding separation along track. The beam spacing can be adjusted as equi-distant or equi-angular. EM 302 uses both CW pulses and FM sweep pulses with pulse compression on reception, in order to increase the maximum useful swath width. The transmit fan is split in several individual sectors with independent active steering according to accomplish compensation for the vessel movements: yaw, pitch and roll. The high density, high resolution, large coverage and water column capability makes EM 302 an ideal system to explore the sea bed and the water column for detection and characterization of a broad spectrum of features.
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code: TN315_EM302
status: (MD_ProgressCode) completed
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platform: (MI_Platform)
citation: (CI_Citation)
title: RV Thomas G. Thompson
alternateTitle: Thomas G. Thompson
date: (CI_Date)
date: 2013-03-06
dateType: (CI_DateTypeCode) creation
identifier: (MD_Identifier)
code: Thomas G. Thompson
description: The R/V Thomas G. Thompson is owned by the Office of Naval Research (ONR) and operated under a Charter Party agreement by the School of Oceanography at the University of Washington as part of the UNOLS fleet (University National Oceanographic Laboratories System). The R/V Thomas G. Thompson (AGOR-23) was constructed by Halter Marine and was delivered to ONR on 8 July 1991. The Thompson is 274 ft in length, 52.5 ft. beam, and at full load has a 19 foot draft. The normal cruising speed is 11 knots, and offers a ships complement for 21 officers and crew, 2 marine technicians and berthing for up to 36 scientists.
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