Metadata Identifier: gov.noaa.nmfs.inport:32489

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 AFSC/RACE/GAP/McConnaughey: South Arctic Reconnaissance-2012-Klein 7180-Data A custom designed Klein 7180 towed sonar was deployed from the NOAA Ship FAIRWEATHER to determine its value of acoustic backscatter as a habitat defining character. A Sonardyne Fusion USBL system was used to estimate underwater positioning of the towfish using an omnidirectional Wideband submini beacon operating in external trigger mode. Navigation data were logged in QINSy and exported into a text file. The towfish positions were then smoothed in Matlab using a custom script that implemented a weighted Hamming filter, using a window of 11 data points. These points represent the smoothed USBL navigation data for the Klein 7180 towfish during the Arctic reconnaissance transit from Dutch Harbor to Kotzebue. These smoothed towfish navigation data, however, will NOT ultimately be reinserted back into the sonar files for mosaicking and analysis. Rather, another navigation smoothing routine will be used for the final product.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 AFSC/RACE/GAP/McConnaughey: South Arctic Reconnaissance-2012-Klein 7180-Data
    2015-09-09
32489
1 No Title Global Change Master Directory (GCMD) Data Center Keywords
    2017-04-24
1 InPort
    1 NOAA Data Management Plan (DMP)
      		32489
      2 NOAA/NMFS/EDM
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        CI_Series

        none found
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        CI_ResponsibleParty

        Count Component Individual Organization Position Email Role Linkage
        2 https://www.fisheries.noaa.gov/inport/item/32489
        1 Alaska Fisheries Science Center resourceProvider https://www.afsc.noaa.gov
        1 GCMD Landing Page Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) custodian https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords
        1 Intelmann, Steve steve.intelmann@noaa.gov pointOfContact
        1 McConnaughey, Bob bob.mcconnaughey@noaa.gov pointOfContact
        1 McConnaughey, Bob bob.mcconnaughey@noaa.gov custodian
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        CI_OnlineResource

        Count Component Linkage Name Description Function
        1 https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information
        1 https://www.afsc.noaa.gov Website Website for this organization information
        1 https://www.fisheries.noaa.gov/inport/item/32489 Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information
        1 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/32489.pdf NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information
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        MD_Identifier or RS_Identifier

        Count Component Code
        2 32489
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        EX_Extent

        Bounding Box Temporal Extent
        Count Component Description West East North South Start End
        1 -175.318433 -165.798705 61.404316 12.068817 2012-08-02 2012-08-04
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        EX_GeographicBoundingBox

        Count Component West East North South
        1 -175.318433 -165.798705 61.404316 12.068817
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        EX_TemporalExtent

        Count Component Start End
        1 2012-08-02 2012-08-04
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        MD_Format

        none found
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        MD_Medium

        none found
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        MD_Constraints

        Count Component Use Limitation
        1 NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
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        MD_ReferenceSystem

        none found
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        MD_GridSpatialRepresentation

        none found
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        MD_Georeferenceable or MI_Georeferenceable

        none found
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        MD_Georectified or MI_Georectified

        none found
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        MD_Dimension

        none found
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        MD_CoverageDescription or MI_CoverageDescription

        none found
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        MD_Band or MI_Band

        none found
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        MI_RangeElementDescription

        none found
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        MD_AggregateInformation

        Count Component Title Code Association Type Code
        1 NOAA Data Management Plan (DMP) crossReference
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        LE_Source or LI_Source

        none found
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        LE_ProcessStep or LI_ProcessStep

        Count Component DateTime Description
        1 2012-10-11T00:00:00 A Klein 7180 towfish was operated at the 500m-range scale and towed at roughly 7-8 knots from the NOAA Ship FAIRWEATHER while attempting to maintain a constant altitude of roughly 50 percent water depth. A Sonardyne Fusion USBL system was used to estimate underwater positioning of the towfish using an omnidirectional Wideband submini beacon operating in external trigger mode. A DWS fiber-optic winch was used to deploy and retrieve the towfish and positioning was obtained by USBL. An Applanix POS/MV was used to reference the Sonardyne XYZ coordinates which were controlled in QINSy. The REDAS driver in QINSy was used to pass both ship and towfish position to Sonarpro, which logged the sonar packets in SDF2 format. A T-Count was also used to capture cable out information and was also captured by QINSy. Navigation data were exported from QINSy into a text file. The towfish positions were then smoothed in Matlab using a custom script that implemented a weighted Hamming filter, using a window of 11 data points. The smoothed towfish navigation data were NOT reinserted back in to the raw sonar files for mosaicking. Point data from the text file were finally imported into ArcGIS.
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        MI_Operation

        none found
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        MI_Platform

        none found
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        MI_Instrument

        none found
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