ME70 Water Column Sonar Data Collected During DY1506
Gulf of Alaska Acoustic-Trawl Survey of Walleye Pollock (DY1506, ME70). The Midwater Assessment and Conservation Engineering (MACE) program of NOAA National Marine Fisheries Service (NMFS), Alaska Fisheries Science Center (AFSC) conducted an acoustic-trawl (AT) stock assessment survey in the Gulf of Alaska (GOA) during late spring and summer of 2015 to estimate the distribution and abundance of walleye pollock (Gadus chalcogrammus). The survey area included the GOA shelf from the Islands of Four Mountains to Chiniak Trough including many associated bays and troughs. The survey was conducted from June 11 to August 16, 2015 in three legs, starting and ending in Kodiak, Alaska, with intermediate port calls in Kodiak, Alaska. The survey was conducted aboard NOAA Ship Oscar Dyson, a 64 meter stern trawler equipped with acoustic and oceanographic instrumentation, and biological sampling capabilities. The primary instrumentation for the survey was a Simrad EK60 split-beam echosounder system utilizing five frequencies (18, 38, 70, 120, and 200 kHz) and a Simrad ME70 multibeam echosounder, with the ME70 trigger synchronized to the EK60 system.
Dataset Citation
- Cite as: Alaska Fisheries Science Center. 2015. 'ME70 Water Column Sonar Data Collected During DY1506'. NOAA National Centers for Environmental Information. doi:10.7289/V5V69GKR [access date]
Dataset Identifiers
- DY1506_ME70
- doi:10.7289/V5V69GKR
- NCEI Metadata ID:gov.noaa.ngdc.mgg.wcd:DY1506_ME70
ISO 19115-2 Metadata
gov.noaa.ngdc.mgg.wcd:DY1506_ME70
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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 | 2015-06-11T21:38:37 to 2015-08-16T00:00:00 |
Spatial Reference System | urn:ogc:def:crs:EPSG::4326Vertical Datum: Unknown |
Spatial Bounding Box Coordinates |
West: -170.036871558254
East: -140.55244565053
South: 52.3830553056981
North: 59.9587932866569
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Not planned |
Purpose | Acoustic-trawl (AT) survey of walleye pollock (Gadus chalcogrammus) in the Gulf of Alaska |
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Global Change Master Directory (GCMD) Science Keywords
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Global Change Master Directory (GCMD) Instrument Keywords
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International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23)
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Lineage Statement | The Simrad ME70 was operated opportunistically for research project work during cruise DY1506. Gaps in ME70 data occurred when the ME70 created crosstalk interference with the EK60 echosounder system and was secured. The ME70 transmit trigger was synchronized to the EK60 transmit ping. |
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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