Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • EK80 Water Column Sonar Data Collected During RL2107

    Metadata Updated: November 1, 2024

    The survey domain, from Cape Flattery, WA to Central Baja California, Mexico, was defined primarily by the modeled distribution of potential habitat for the northern subpopulation (stock) of Pacific Sardine (Zwolinski et al., 2011), with a southern extension permitted by available sampling effort. This area was chosen to encompass the anticipated distributions of the northern stock of Pacific Sardine and the central and northern stocks of Northern Anchovy of the west coasts of the U.S., Canada, and Mexico, but it also spanned portions of the southern stock of Pacific Sardine, Pacific Mackerel, Jack Mackerel, Pacific Round Herring, and Pacific Herring. During summer 2021, the west coasts of the United States and Baja California were surveyed using Lasker, Carranza, Lisa Marie, Long Beach Carnage, and USVs. Compulsory transects were nearly perpendicular to the coast and separated by 10 nmi. The survey began off Cape Flattery, WA and the combination of survey platforms progressed southwards toward Punta Abreojos, MX.

    On Lasker, multi-frequency Wideband Transceivers (18-, 38-, 70-, 120-, 200-, and 333-kHz Simrad EK80 WBTs) were configured with split-beam transducers (Simrad ES18-11, ES38B, ES70-7C, ES120-7C, ES2007C, and ES333-7C). The transducers were mounted on the bottom of a retractable keel or “centerboard”. The keel was retracted (transducers ~5-m depth) during calibration, and extended to the intermediate position (transducers ~7-m depth) during the survey. Exceptions were made during shallow water operations, when the keel was retracted; or during times of heavy weather, when the keel was extended (transducers ~9-m depth) to provide extra stability and reduce the effect of weather-generated noise. Transducer position and motion were measured at 5 Hz using an inertial motion unit (POS-MV; Trimble/Applanix).

    Final Summer 2021 Report: https://doi.org/10.25923/cadh-x974 Final Summer 2021 Biomass Report: https://doi.org/10.25923/77kp-ww39

    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 August 30, 2024
    Metadata Created Date November 1, 2024
    Metadata Updated Date November 1, 2024
    Reference Date(s) July 6, 2021 (creation), August 30, 2024 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NGDC MGG Sonar Water Column

    Other Data Resources

    Additional Metadata

    Resource Type Series
    Metadata Date August 30, 2024
    Metadata Created Date November 1, 2024
    Metadata Updated Date November 1, 2024
    Reference Date(s) July 6, 2021 (creation), August 30, 2024 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei:RL2107_EK80
    Access Constraints Cite as: NOAA Southwest Fisheries Science Center. 2024. EK80 Water Column Sonar Data Collected During RL2107. NOAA National Centers for Environmental Information. https://doi.org/10.25921/t1m3-w179 [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 -116.03915
    Bbox North Lat 48.53934
    Bbox South Lat 30.19588
    Bbox West Long -126.79559
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 1146f343-0913-46d5-a182-cf914e6e6630
    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": [[[-126.79559, 30.19588], [-116.03915, 30.19588], [-116.03915, 48.53934], [-126.79559, 48.53934], [-126.79559, 30.19588]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2021-07-06T00:00:00
    Temporal Extent End 2021-10-15T11:59:59

    Didn't find what you're looking for? Suggest a dataset here.