b00474cf-1a78-4775-8ec9-343cf1e62fb4 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2024-11-19 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Raw acoustic data collected by an EK80 echo sounder in Stromness Bay, South Georgia during the cruise DY158 on 5 January 2023 2024-11-19 creation 2024-11-19 revision 2024-11-19 publication 2024-11-19 released 1.0 https://doi.org/10.5285/b00474cf-1a78-4775-8ec9-343cf1e62fb4 doi GB/NERC/BAS/PDC/01945 https://data.bas.ac.uk/ Please cite this item as: Workman, E., Dornan, T., & Saunders, R. (2024). Raw acoustic data collected by an EK80 echo sounder in Stromness Bay, South Georgia during the cruise DY158 on 5 January 2023 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/b00474cf-1a78-4775-8ec9-343cf1e62fb4 Acoustic backscatter data were collected on board the RRS Discovery during cruise DY158 on 05/01/2023 in Stromness Bay, South Georgia. Data were collected using a Simrad EK80 echosounder at 18, 38, 120, 200 and 333 kHz. Funding source: This work was carried out in the frame of WCB-POETS survey cruises, and the methane survey was funded by the Collaborative Antarctic Science Scheme (CASS). No credit. completed Workman, Evelyn British Antarctic Survey Researcher author Dornan, Tracey British Antarctic Survey Researcher author Saunders, Ryan British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Oceans > Ocean Acoustics theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher EK80 South Georgia acoustic backscatter echosounder methane flare theme Stromness Bay South Georgia Island place Oceanographic geographical features theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC data policy and supplied under Open Government Licence v.3 otherRestrictions No restrictions apply. url url crossReference url url crossReference doi doi crossReference textTable eng utf8 geoscientificInformation oceans -36.7 -36.6 -54.2 -54.1 2023-01-05 2023-01-05 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/plain application/octet-stream bytes 31138512896 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=b00474cf-1a78-4775-8ec9-343cf1e62fb4 WWW:LINK-1.0-http--link Get Data Download data download bytes 31138512896 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=b00474cf-1a78-4775-8ec9-343cf1e62fb4 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Data were collected using a Simrad EK80 echosounder at 18, 38, 120, 200 and 333 kHz. The EK80 was calibrated on 04/01/2023 in Rosita Harbour, South Georgia. Standard calibration procedures were used and all frequencies, except the 333 kHz, were calibrated using a 38.1 mm tungsten carbide sphere. The 333 kHz was not calibrated, as previous attempts using a 20 mm sphere were unsuccessful due to the depths the sphere is at on Discovery versus the usable range. All calibrations were successful and uploaded to the transducers on completion with the exception of the 200 kHz transducer which had an RMS (root mean square) of 0.4, and the 333 kHz transducer which remains uncalibrated. The 200 kHz was reprocessed with a 1dB target window on target strength, resulting in an RMS of 0.2, which was accepted and uploaded to the system on 7/1/2023 12:21:25. More information about the calibration can be found in the Cruise Report for DY158: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/dy158.pdf. The dataset comprises Simrad raw format files that have not undergone any processing or quality checking. The raw data files are stored by the Polar Data Centre (PDC) at BAS. Each .raw data file contains approximately 5 minutes of data and is approximately 100 MB in size. Each data file contains raw ping data with associated GPS fixes and date/time. Data collection: Data were collected using a Simrad EK80 echosounder at 18, 38, 120, 200 and 333 kHz. Data quality: Raw data (time, gps and acoustic) are not quality checked. The instrument was calibrated on 04/01/2023 in Rosita Harbour, South Georgia. asNeeded completed