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RV Investigator Voyage IN2017_T01 EM122 Multibeam Echosounder Data

Created 25/06/2025

Updated 25/06/2025

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This record describes multibeam echosounder data collected on RV Investigator voyage IN2017_T01, Natural iron fertilisation of oceans around Australia: linking terrestrial dust and bushfires to marine biogeochemistry, which departed Sydney on the 24th September 2017 and returned to Broome on the 8th October 2017. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, and backscatter information between Sydney and Broome. 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 at CSIRO. There are 87 files totaling 2.97 GB of raw 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. Tide corrections were not applied to the processed data. 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 IN2017_T01 EM122 Multibeam Echosounder Data
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/e3dae812-7503-449b-a73d-6ab403068ffc
Contact Point
CSIRO Marlin Data Catalogue
data-requests-hf@csiro.au
Reference Period 29/06/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        118.38566625000006,
        -33.37486401252532
      ],
      [
        156.17863500000007,
        -33.37486401252532
      ],
      [
        156.17863500000007,
        -9.382202801098728
      ],
      [
        118.38566625000006,
        -9.382202801098728
      ],
      [
        118.38566625000006,
        -33.37486401252532
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "RV Investigator Voyage IN2017_T01 EM122 Multibeam Echosounder Data". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/rv-investigator-voyage-in2017_t01-em122-multibeam-echosounder-data