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    • EK60 Water Column Sonar Data Collected During OD0707

    Metadata Updated: June 9, 2023

    AFSC Echo Integration-Trawl of Walleye Pollock (Theraga chalcogramma) on the U.S. and Russian Bering Sea Shelf in June and July 2007 (OD0707, EK60). The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl survey of abundance and distribution of walleye pollock (Theragra chalcogramma; Gadus chalcogramma) on the U.S eastern Bering Sea shelf and Russian Cape Navarin areas 2 June to 30 July 2007. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation, utilizing a Simrad EK60 split-beam echosounder system equipped with five frequencies (18, 38, 70, 120, and 200 kHz). The survey was conducted in three legs starting and ending in Dutch Harbor, Alaska with all port calls in Dutch Harbor. Leg 1 was conducted 2-20 June, leg 2 was conducted 21 June to 9 July, and leg 3 was conducted 11-30 July. Standard acoustic system sphere calibrations were conducted at the start of the cruise (2 June), at the start of leg 2 (21 June), at the end of leg 2 (8 July), and at the end of the cruise (29 July); all calibrations were accomplished in Captains Bay, Dutch Harbor.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 14, 2021
    Metadata Created Date November 10, 2022
    Metadata Updated Date June 9, 2023
    Reference Date(s) June 1, 2007 (creation), June 3, 2019 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NGDC MGG Sonar Water Column

    Other Data Resources

    Additional Metadata

    Resource Type Series
    Metadata Date September 14, 2021
    Metadata Created Date November 10, 2022
    Metadata Updated Date June 9, 2023
    Reference Date(s) June 1, 2007 (creation), June 3, 2019 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei.wcd:OD0707_EK60
    Access Constraints Cite as: NOAA Alaska Fisheries Science Center. 2007. 'EK60 Water Column Sonar Data Collected During OD0707'. NOAA National Centers for Environmental Information. https://doi.org/10.25921/kave-ap39 [access date], 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., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Resource may not be available for up to one year after initial collection.
    Bbox East Long 179.99999
    Bbox North Lat 62.35788
    Bbox South Lat 53.84933
    Bbox West Long -179.99999
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 3085378b-319a-4c49-bafb-4b708f45aa7b
    Harvest Source Id ab8b0290-e4db-4a00-89f2-4e427c2054b2
    Harvest Source Title NGDC MGG Sonar Water Column
    Licence 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., Not subject to copyright protection within the United States.
    Lineage Calibrated w/ calibration data
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-179.99999, 53.84933], [179.99999, 53.84933], [179.99999, 62.35788], [-179.99999, 62.35788], [-179.99999, 53.84933]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2007-06-01T03:26:20
    Temporal Extent End 2007-07-30T06:31:28

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