NEFSC 2002 Surfclam and Ocean Quahog Survey (DE0206, EK500)
The 2002 region-wide survey for Atlantic surfclam (Spisula solidissima) and Ocean Quahog (Arctica islandica) was conducted in continental shelf waters, from Delmarva Peninsula to Georges Bank aboard the FRV DELAWARE II. The survey, conducted by the NMFS Northeast Fisheries Science Center, provides indices of abundance and recruitment for both species. In addition, tows were made at 25 non-random sites during the survey to support on-going scientific studies.
- Cite as: Northeast Fisheries Science Center (2002): Water Column Sonar Data Collection (DE0206, EK500). National Centers for Environmental Information, NOAA. doi:10.7289/V5FQ9TKB [access date]
gov.noaa.ngdc.mgg.wcd:DE0206_EK500
Search Data |
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Distribution Formats |
- Simrad EK500 data logged in .ek5 format (Version: 1)
- File Specification: Simrad EK500 data logged with Echolog 500. These files contain EK500 data telegrams output by an EX500 on its Ethernet port. The .ek5 file contains binary Ethernet packets as output by the Simrad echosounder. The EK500 manual contains full details of the EK500 Ethernet telegram formats and should be consulted for interpreting the Ethernet packets recorded within an .ek5 file.
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Ordering Instructions |
Contact the Water Column Sonar Data Manager to order data |
Distributor |
Water Column Sonar Data Manager NOAA National Centers for Environmental Information (303) 497-4742 wcd.info@noaa.gov
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Dataset Principal Investigator |
Victor Nordahl Fisheries Biologist NEFSC 508-495-2334 vic.nordahl@noaa.gov
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Time Period |
2002-07-15T14:35:32 to 2002-07-23T23:59:59 |
Spatial Reference System |
urn:ogc:def:crs:EPSG:4326 |
Spatial Bounding Box Coordinates |
West: -70.4058607744254
East: -67.0279288960239
South: 39.5088500857849
North: 41.3154403849263
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Spatial Coverage Map |
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Documentation links not available. |
Publication Dates |
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Dataset Progress Status |
Complete - production of the data has been completed |
Data Update Frequency |
Not planned |
Purpose |
The NEFSC surfclam and ocean quahog survey collects data for the surfclam and ocean quahog 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.
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Dataset Citation |
- Cite as: Northeast Fisheries Science Center (2002): Water Column Sonar Data Collection (DE0206, EK500). National Centers for Environmental Information, NOAA. doi:10.7289/V5FQ9TKB [access date]
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Custodians |
- NOAA National Centers for Environmental Information
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Resource Providers |
- DOC/NOAA/NMFS/NEFSC > Northeast Fisheries Science Center
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Points of Contact |
- DOC/NOAA/NMFS/NEFSC > Northeast Fisheries Science Center
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Publishers |
- NOAA National Centers for Environmental Information
- NOAA National Centers for Environmental Information
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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
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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
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Instrument keywords |
Global Change Master Directory (GCMD) Instrument Keywords- In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System
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Place keywords |
International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
Global Change Master Directory (GCMD) Location Keywords
- GEOGRAPHIC REGION > GLOBAL
- Vertical Location > VERTICAL LOCATION > SEA FLOOR
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Use Constraints |
- Cite as: Northeast Fisheries Science Center (2002): Water Column Sonar Data Collection (DE0206, EK500). National Centers for Environmental Information, NOAA. doi:10.7289/V5FQ9TKB [access date]
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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.
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Fees |
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Lineage information for: series |
Processor |
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Lineage information for: series |
Lineage Statement |
The data files contain the echogram "Q" and single target detections "E" telegrams for 18 (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. |
Lineage information for: repository |
Processing Steps |
- 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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Acquisition Information (collection) |
Instrument |
- Simrad EK500
- Simrad ME70
- Simrad EK60
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Platform |
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Operation |
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Last Modified: 2017-05-30
For questions about the information on this page, please email:
wcd.info@noaa.gov