{
    "identifier": "gov.noaa.ncei:SH1904_EK60-ek5",
    "accessLevel": "public",
    "contactPoint": {
        "@type": "vcard:Contact",
        "fn": "Your contact point",
        "hasEmail": "mailto:[email protected]"
    },
    "programCode": [
        "010:000"
    ],
    "landingPage": "",
    "title": "EK60-ek5 Water Column Sonar Data Collected During SH1904",
    "description": "Acoustic-Trawl Surveys of Walleye Pollock (Gadus chalcogrammus) in the Gulf of Alaska (SH2019-04). 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 Shelikof Strait, Chirikof shelf break,and Marmot Bay areas of the Gulf of Alaska (GOA) in the late winter\/early spring of 2019 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). This survey was conducted aboard NOAA Ship Bell M. Shimada, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation. The primary acoustic instrument for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz). The vessel departed Kodiak, Alaska on 6 March and conducted an acoustic system calibration in Kalsin Bay, Kodiak Island 7 March. The Shelikof Strait was conducted 7-16 March, the Chirikof shelf break sure was conducted 16-18 March, and the Marmot Bay survey was conducted 19-20 March. A post-cruise acoustic system calibration was conducted 20-21 March in Kalsin Bay and the vessel arrived in Kodiak, Alaska on 21 March.",
    "language": "",
    "distribution": [
        {
            "@type": "dcat:Distribution",
            "mediaType": "application\/json",
            "accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ncei%3ASH1904_EK60-ek5"
        },
        {
            "@type": "dcat:Distribution",
            "mediaType": "text\/html",
            "accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ncei%3ASH1904_EK60-ek5\/html"
        },
        {
            "@type": "dcat:Distribution",
            "mediaType": "application\/xml",
            "accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ncei%3ASH1904_EK60-ek5\/xml"
        }
    ],
    "bureauCode": [
        "010:04"
    ],
    "modified": "2024-08-08T09:20:12.072Z",
    "publisher": {
        "@type": "org:Organization",
        "name": "Your Publisher"
    },
    "theme": "",
    "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",
        "Vertical Location > Water Column",
        "In Situ\/Laboratory Instruments > Profilers\/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System",
        "oceans",
        "geoscientificInformation"
    ]
}