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EK80 Water Column Sonar Data Collected During DY2001
The Midwater Assessment and Conservation Engineering (MACE) program of NOAA Fisheries, Alaska Fisheries Science Center (AFSC) conducted acoustic-trawl (AT) stock assessment surveys in the Gulf of Alaska (GOA) during the winter of 2020 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). These surveys were conducted aboard NOAA Ship Oscar Dyson, a 64 meter research stern trawler equipped with acoustic and oceanographic instrumentation. The primary acoustic instrument for the surveys was a Simrad EK80 split-beam echosounder system utilizing six frequencies (18, 38, 70, 120, 200, and 333 kHz). The vessel departed Kodiak, Alaska on 11 February and conducted the Shumagin Islands survey (including Shumagin Trough, Stepovak Bay, Renshaw Point, Unga Strait, and West Nagai Strait) and ended the cruise in Sand Point, Alaska on 17 February, 2020. A calibration of the EK80 echosounder system was conducted at the start of the 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 acoustic-trawl (AT) stock assessment surveys in the Gulf of Alaska (GOA) during the winter of 2020 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). These surveys were conducted aboard NOAA Ship Oscar Dyson, a 64 meter research stern trawler equipped with acoustic and oceanographic instrumentation. The primary acoustic instrument for the surveys was a Simrad EK80 split-beam echosounder system utilizing six frequencies (18, 38, 70, 120, 200, and 333 kHz). The vessel departed Kodiak, Alaska on 11 February and conducted the Shumagin Islands survey (including Shumagin Trough, Stepovak Bay, Renshaw Point, Unga Strait, and West Nagai Strait) and ended the cruise in Sand Point, Alaska on 17 February, 2020. A calibration of the EK80 echosounder system was conducted at the start of the 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=DY2001&instruments=EK80",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "AWS Cloud Storage Bucket",
"mediaType": "placeholder/value",
"description": "AWS Cloud Storage provides additional public access to water column sonar data through the NOAA Big Data Project",
"downloadURL": "https://registry.opendata.aws/ncei-wcsd-archive/",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "Water Column Sonar Data Archive Homepage",
"mediaType": "placeholder/value",
"description": "Web page containing information on the water column sonar data archive.",
"downloadURL": "https://www.ngdc.noaa.gov/mgg/wcd/",
"describedByType": "application/octet-steam"
},
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"description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.",
"downloadURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords",
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"title": "International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)",
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]
|
| identifier | gov.noaa.ncei:DY2001_EK80 |
| issued | 2020-02-11T00:00:00.000+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",
"Gulf of Alaska",
"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 | 2021-05-03T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| rights | otherRestrictions, otherRestrictions |
| spatial | -152.11717405608,54.8935378758669,-160.635901542544,58.0242643537106 |
| temporal | 2020-02-11T00:00:00+00:00/2020-02-17T11:59:59+00:00 |
| title | EK80 Water Column Sonar Data Collected During DY2001 |
