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RV Investigator Voyage IN2022_V07 EM122 Multibeam Echosounder Data

Created 12/10/2024

Updated 12/10/2024

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This record describes multibeam echosounder data collected on RV Investigator voyage IN2022_V07, HALO - Halimeda bioherm Origins, function and fate in the northern Great Barrier Reef." The voyage took place between August 15, 2022 and September 7, 2022 (AEST), departing from Brisbane and returning to Cairns. Piggyback project: Dinoflagellates & broader planktonic assemblage observation. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter during transit from Brisbane to Cairns, and during deep water operations outside of the Great Barrier Reef. The EM122 provides a 1 degree by 1 degree angular resolution. The echosounder's nominal frequency is 12 kHz. Data are stored in .all raw format for bathymetry and backscatter and .wcd format for watercolumn backscatter at CSIRO. There are 176 .all files totaling 7.21 GB of raw bathymetry/backscatter data and 174 .wcd files totaling 9.56GB of watercolumn data in this dataset. Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in .all format are corrected for motion and position. Predicted tides were calculated using AusTides 2022 and applied relative to MSL. Processed data had outliers removed. Processed line data are available in .gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format. Additional information regarding this dataset, including information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

Files and APIs

Additional Info

Field Value
Title RV Investigator Voyage IN2022_V07 EM122 Multibeam Echosounder Data
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/eb2c67dd-b3a9-4420-b637-136f7941486a
Contact Point
Atlantic Oceanographic and Meteorological Laboratory (AOML)
NCMIGeophysicalSurveyMapping@csiro.au
Reference Period 25/10/2022
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        143.8223,
        -27.4165
      ],
      [
        153.5146,
        -27.4165
      ],
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        153.5146,
        -13.1988
      ],
      [
        143.8223,
        -13.1988
      ],
      [
        143.8223,
        -27.4165
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Data.gov.au