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EK80 Water Column Sonar Data Collected During DY2002
The Midwater Assessment and Conservation Engineering (MACE) program of NOAA Fisheries, Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the southeastern Aleutian Basin near Bogoslof Island during the winter of 2020 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). This survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter research stern trawler equipped with acoustic and oceanographic instrumentation. The primary acoustic instrument for the survey was a Simrad EK80 split-beam echosounder system utilizing six frequencies (18, 38, 70, 120, 200, and 333 kHz). The vessel departed Sand Point, Alaska on 17 February transiting toward the southeast Aleutian Basin. The survey was conducted 19-23 February, 2020, between 167 and 170 W longitude south of Bogoslof Island and north of Unalaska, Umnak Islands, and the Islands of Four Mountains. Research trawls were conducted in Shelikof Strait on 18 and 27 February and the vessel arrived in Kodiak, Alaska to end the cruise on 28 February. A calibration of the echosounder system was conducted at the beginning of the previous cruise on 12 February in Uganik Bay, Kodiak Island, Alaska.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "NOAA National Centers for Environmental Information",
"@type": "vcard:Contact",
"hasEmail": "mailto:ncei.info@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | The Midwater Assessment and Conservation Engineering (MACE) program of NOAA Fisheries, Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the southeastern Aleutian Basin near Bogoslof Island during the winter of 2020 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). This survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter research stern trawler equipped with acoustic and oceanographic instrumentation. The primary acoustic instrument for the survey was a Simrad EK80 split-beam echosounder system utilizing six frequencies (18, 38, 70, 120, 200, and 333 kHz). The vessel departed Sand Point, Alaska on 17 February transiting toward the southeast Aleutian Basin. The survey was conducted 19-23 February, 2020, between 167 and 170 W longitude south of Bogoslof Island and north of Unalaska, Umnak Islands, and the Islands of Four Mountains. Research trawls were conducted in Shelikof Strait on 18 and 27 February and the vessel arrived in Kodiak, Alaska to end the cruise on 28 February. A calibration of the echosounder system was conducted at the beginning of the previous cruise on 12 February in Uganik Bay, Kodiak Island, Alaska. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Water Column Sonar Data Map Viewer",
"mediaType": "placeholder/value",
"description": "Interactive map viewer to allow discovery and access to water column sonar data",
"downloadURL": "https://www.ncei.noaa.gov/maps/water-column-sonar/index.html?surveys=DY2002&instruments=EK80",
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"description": "AWS Cloud Storage provides additional public access to water column sonar data through the NOAA Big Data Project",
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{
"@type": "dcat:Distribution",
"title": "Water Column Sonar Data Archive Homepage",
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"downloadURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords",
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|
| identifier | gov.noaa.ncei:DY2002_EK80 |
| issued | 2020-02-17T00:00:00.000+00:00 |
| keyword |
[
"Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering",
"Earth Science > Oceans > Aquatic Sciences > Fisheries",
"Earth Science > Oceans > Ocean Acoustics",
"Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic",
"Earth Science > Biosphere > Ecosystems > Marine Ecosystems",
"Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic",
"Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems",
"Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry",
"Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography",
"Bering Sea",
"DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
"DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce",
"DOC/NOAA/NMFS > National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
"Vertical Location > Water Column",
"In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System"
]
|
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2021-05-31T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, otherRestrictions |
| spatial | -152.124132007936,52.8411614953175,-169.916834913478,58.0193172270021 |
| temporal | 2020-02-17T00:00:00+00:00/2020-02-28T11:59:59+00:00 |
| title | EK80 Water Column Sonar Data Collected During DY2002 |
