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.
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]
Dataset Identifiers
- DE9810_EK500
- doi:10.7289/V5WW7FNP
- NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:DE9810_EK500
ISO 19115-2 Metadata
gov.noaa.ngdc.mgg.wcd:DE9810_EK500
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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
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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. |
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Global Change Master Directory (GCMD) Science Keywords
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Global Change Master Directory (GCMD) Data Center Keywords
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Global Change Master Directory (GCMD) Instrument Keywords
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Place keywords |
International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
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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. |
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Last Modified: 2020-06-03
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov