gov.noaa.ncei:SD1023-201801_EK80 eng; USA utf8 series Water Column Sonar Series-Level Metadata NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact 2022-02-22 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) curve 5966 World Geodetic System 1984 WGS 84 2007-08-27 revision https://epsg.org/crs_4326/WGS-84.html WGS 84 GML of World Geodetic System 1984 coordinate reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::4326 Vertical Datum: Unknown Vertical Datum: Unknown EK80 Water Column Sonar Data Collected During SD1023-201801 2018-06-30 creation 2022-02-22 publication NOAA National Centers for Environmental Information SD1023-201801_EK80 International DOI Foundation (IDF) doi:https://doi.org/10.25921/hqha-z958 NOAA National Centers for Environmental Information NCEI Metadata ID:SD1023-201801_EK80 NOAA National Centers for Environmental Information custodian NOAA National Centers for Environmental Information publisher Robert Levine University of Washington Graduate student 1503 NE Boat St Seattle WA 98195 USA leviner@uw.edu principalInvestigator Alex De Robertis AFSC Research Fishery Biologist 7600 Sand Point Way NE Seattle WA 98115 USA principalInvestigator DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center 206-526-4000 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA author Summer surveys of the Chukchi Sea indicate that high densities of age-0 gadid fishes, historically Arctic cod (Boreogadus saida) but recently also walleye pollock (Gadus chalcogrammus), dominate the pelagic fish community. Adults are comparatively scarce, suggesting that either overwinter survivorship of age-0 gadids is low, or that they emigrate to other areas of the Pacific Arctic. To examine population movement, we conducted repeat acoustic surveys with saildrone autonomous surface vehicles equipped with echosounders throughout summer 2018. Results of these surveys were published in Levine et al. (2021). The survey was completed by two 7-meter saildrone USVs. The primary water column acoustic instrument for the survey was a Simrad EK80 mini scientific echosounder system equipped with a dual frequency ES38-18/200-18CR transducer (38 kHz split-beam, 200 kHz single beam). The vessels departed Dutch Harbor, AK on 30 June 2018, conducted acoustic surveys of the eastern Chukchi Sea from 20 July to 11 September, and returned to Dutch Harbor on 06 October. The echosounder system was calibrated via the standard sphere method before and after the cruise. Levine, R.M., De Robertis, A., Grünbaum, D., Woodgate, R., Mordy, C.W., Mueter, F., Cokelet, E., Lawrence-Slavas, N. and Tabisola, H. (2021), Autonomous vehicle surveys indicate that flow reversals retain juvenile fishes in a highly advective high-latitude ecosystem. Limnol Oceanogr, 66: 1139-1154. https://doi.org/10.1002/lno.11671 We used Saildrone uncrewed surface vehicles (USVs) to conduct repeat acoustic surveys of the northeastern Chukchi Sea to quantify the intraseasonal variability in the spatial distribution of gadids in summer 2018. completed NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA National Centers for Environmental Information Water Column Sonar Data Manager (303) 497-4742 325 Broadway, Mail Code E/NE42 Boulder CO 80305-3328 USA wcd.info@noaa.gov pointOfContact notPlanned 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 theme Global Change Master Directory (GCMD) Science Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/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 custodian Chukchi Sea place International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) 2010-08-24 revision International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) https://iho.int/ International Hydrographic Organization (IHO) Sea Area ("Limits of Oceans and Seas" publication S-23) Publication of Sea Areas is maintained by IHO. information resourceProvider 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 dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/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 custodian Vertical Location > Water Column place Global Change Master Directory (GCMD) Location Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/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 custodian In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System instrument Global Change Master Directory (GCMD) Instrument Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/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 custodian otherRestrictions Cite as: NOAA Alaska Fisheries Science Center. 2022. EK80 Water Column Sonar Data Collected During SD1023-201801. NOAA National Centers for Environmental Information. https://doi.org/10.25921/hqha-z958 [access date] otherRestrictions 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. otherRestrictions 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. 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. otherRestrictions Resource may not be available for up to one year after initial collection. SD1023-201801 largerWorkCitation operation eng; USA oceans geoscientificInformation -168.9308 -157.74742 53.84422 72.54504 2018-06-30T00:00:00 2018-10-06T11:59:59 Trackline physicalMeasurement NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor Free Contact the NCEI Water Column Sonar Data Manager to order data. EK80 1 Simrad EK80 raw files. See the Simrad EK80 interface specification manual for additional information. https://www.ncei.noaa.gov/maps/water-column-sonar/index.html?surveys=SD1023-201801&instruments=EK80 HTTPS Water Column Sonar Data Map Viewer Interactive map viewer to allow discovery and access to water column sonar data search https://registry.opendata.aws/ncei-wcsd-archive/ HTTPS AWS Cloud Storage Bucket AWS Cloud Storage to provide additional public access to water column sonar data through the NOAA Big Data Project download https://www.ngdc.noaa.gov/mgg/wcd/ HTTPS Water Column Sonar Data Archive Homepage Web page containing information on the water column sonar data archive. information collectionHardware 24-Oct-2018 Instrument calibration information Calibrated w/ calibration data series Horizontal Positional Accuracy Positional accuracy dependent on navigation GPS, ship motion correction, and sound velocity profile accuracy. true Vertical Positional Accuracy Vertical accuracy is dependent on navigation GPS and ship motion corrections. true Raw unprocessed data files 2018-06-30T00:00:00 Robert Levine University of Washington Graduate student 1503 NE Boat St Seattle WA 98195 USA leviner@uw.edu principalInvestigator series The EK80 echosounder system transducers installed on the saildrones are mounted in a gimbal mount on the vehicle’s keel at a depth of 1.9 m (i.e. draft correction setting of 1.9 meters below the surface should be applied). Data during the survey were collected at a pulse length of 0.512 milliseconds. Note that some data during transits in deeper water in this data set were collected at pulse length of 1.024 milliseconds. The EK80 system was calibrated with a 64 mm copper sphere at 38 kHz and a 38.1 mm tungsten-carbide sphere prior to deployment and at the end of the cruise. A text file (*.ecs) containing the final calibration parameters used to process the 0.512 ms survey results is provided. The EK80 raw files do not contain GPS information. GPS data are provided as ancillary CSV files generated by Saildrone. The echosounder and vehicle clocks were synchronized hourly. The saildrone vehicles and the installation and operation of echosounders are described in De Robertis et al. (2019). Data from each of the 2 vehicles (SD1022 and SD1023) used in this survey are provided as standalone data sets. De Robertis, A., Lawrence-Slavas, N., Jenkins, R., Wangen, R., Mordy, C.W., Meinig, C., Levine, M., Peacock, D., and Tabisola, H. (2019), Long-term measurements of fish backscatter from Saildrone unmanned surface vehicles and comparison with observations from a noise-reduced research vessel. ICES Journal of Marine Science, 76(7): 2459-2470. https://doi.org/10.1093/icesjms/fsz124 Simrad EK80 Echosounder EK80 Simrad - Kongsberg Maritime AS https://www.kongsberg.com/maritime/products/ocean-science/ocean-science/es_scientific/ek80software/ Simrad Ek80 information web page Page contains general information on the Ek80 and has links to details on operation and file formats information resourceProvider Simrad EK80 echosounder The Simrad EK80 is the most modern "high end" split beam scientific echo sounder in the fishery scientific market. Based on more than 60 years of research and development in close collaboration with leading marine scientists this wide band echo sounder system has succeeded the famous EK60, which became an international standard for fish stock assessment. The Simrad EK80 can operate a large number of frequencies simultaneously ranging from 10 to 500 kHz. A wide selection of high quality accurate transducers is available. SD1023-201801_EK80 completed Saildrone Voyager Saildrone Saildrone uncrewed surface vehicles (USVs) enable the collection of high-quality ocean data for a wide variety of applications. Saildrone 1050 West Tower Avenue Alameda CA 94501 USA https://www.saildrone.com/ Saildrone Saildrone is a collector of ocean related in situ data via uncrewed vehicle, above and below the sea surface. information pointOfContact Simrad EK80 Echosounder EK80 Simrad - Kongsberg Maritime AS https://www.kongsberg.com/maritime/products/ocean-science/ocean-science/es_scientific/ek80software/ Simrad Ek80 information web page Page contains general information on the Ek80 and has links to details on operation and file formats information resourceProvider Simrad EK80 echosounder The Simrad EK80 is the most modern "high end" split beam scientific echo sounder in the fishery scientific market. Based on more than 60 years of research and development in close collaboration with leading marine scientists this wide band echo sounder system has succeeded the famous EK60, which became an international standard for fish stock assessment. The Simrad EK80 can operate a large number of frequencies simultaneously ranging from 10 to 500 kHz. A wide selection of high quality accurate transducers is available.