EK500 Water Column Sonar Data Collected During DE9810

NEFSC 1998 Atlantic Herring Acoustic/Midwater Trawl Survey (DE9810, EK500). The NEFSC Atlantic herring acoustic survey is a fisheries independent survey that provides scientific data for Atlantic herring assessments in the U.S. mid-Atlantic and New England regions. The survey is conducted in the fall on pre-spawning and spawning herring primarily in the Georges Bank region, but with other historical sites in the Gulf of Maine surveyed. The survey is a systematic design with parallel transects oriented perpendicular to bathymetric features. Midwater trawl sites are selected on an ad hoc basis to sample acoustic backscatter attributed to Atlantic herring as well as backscatter by other organisms. The primary gear is multifrequency Simrad echosounders, but midwater trawl, CTD, and a host of other scientific sensor data are collected ancillary to the acoustic data.
  • Cite as: Northeast Fisheries Science Center. 1998. 'EK500 Water Column Sonar Data Collected During DE9810'. NOAA National Centers for Environmental Information. doi:10.7289/V5WW7FNP [access date]
gov.noaa.ngdc.mgg.wcd:DE9810_EK500
Search Data
Distribution Formats
  • Simrad EK500 data logged with BI500 system (Version:1)
    • File Specification: Kongsberg/Simrad .raw files are generated by ME70, EK60 or ES60 instruments. They contain power and optionally angular position data with each beam/frequency identified by an independent channel. See the Simrad interface specification manual for further information. The .wcd files are generated by Kongsberg EM302 or EM122 instruments. See Kongsberg documentation for more information.
Ordering Instructions Contact the NCEI Water Column Sonar Data Manager to order data.
Distributor NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Water Column Sonar Data Manager
NOAA National Centers for Environmental Information
(303) 497-4742
wcd.info@noaa.gov
Time Period 1998-09-10T04:18:04 to 1998-10-11T09:17:29
Spatial Reference System urn:ogc:def:crs:EPSG::4326Vertical Datum: Unknown
Spatial Bounding Box Coordinates
West:-70.78067
East:-67.10284
South:41.40867
North:44.22017
Spatial Coverage Map
General Documentation
Associated Resources
    Publication Dates
    • creation: 1998-09-10
    • publication: 2015-12-01
    Dataset Progress Status Complete - production of the data has been completed
    Data Update Frequency Not planned
    Purpose The NEFSC Atlantic herring acoustic survey provides fisheries independent abundance and biological data for the U.S. Atlantic herring assessment.
    Use Limitations
    • 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.
    Dataset Citation
    • Cite as: Northeast Fisheries Science Center. 1998. 'EK500 Water Column Sonar Data Collected During DE9810'. NOAA National Centers for Environmental Information. doi:10.7289/V5WW7FNP [access date]
    Cited Authors
    • DOC/NOAA/NMFS/NEFSC > Northeast Fisheries Science Center
    Principal Investigators
    • Michael Jech
      DOC/NOAA/NMFS/NEFSC> Northeast Fisheries Science Center
    Custodians
    • NOAA National Centers for Environmental Information
    Publishers
    • NOAA National Centers for Environmental Information
    Theme keywords Global Change Master Directory (GCMD) Science Keywords
    • 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
    Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
    • 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
    Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
    • In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
    Place keywords International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
    • North Atlantic Ocean
    Global Change Master Directory (GCMD) Location Keywords
    • Vertical Location > Water Column
    Use Constraints
    • Cite as: Northeast Fisheries Science Center. 1998. 'EK500 Water Column Sonar Data Collected During DE9810'. NOAA National Centers for Environmental Information. doi:10.7289/V5WW7FNP [access date]
    • 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.
    Access Constraints
    • 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.
    • Resource may not be available for up to one year after initial collection.
    Fees
    • Free
    Lineage information for:series
    Processor
    • DOC/NOAA/NMFS/NEFSC> Northeast Fisheries Science Center
    Lineage information for:series
    Lineage Statement The data files contain the echogram "Q" and single target detections "E" telegrams for 12 (T1), 38 (T2), and 120 (T3) kHz data. The sample angle "B", power "W", volume backscatter "V", and TS "P" data for the 38 kHz were collected, and are available upon request from the NEFSC.
    Acquisition Information (collection)
    Instrument
    • Simrad EK500
    • Simrad ME70
    • Simrad EK60
    Platform
    • Delaware II (DE)
    Operation
    • DE9810_EK500
    Last Modified: 2020-06-03
    For questions about the information on this page, please email:ncei.info@noaa.gov