Data

RV Investigator Voyage IN2018_V05 EM122 Multibeam Echosounder Data

Australian Ocean Data Network
CSIRO (Associated with) CSIRO O&A, Information & Data Centre (Point of contact) CSIRO Oceans & Atmosphere - Hobart (Associated with) Vandenbossche, Phil (Originator of, Processor of)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://marlin.csiro.au/geonetwork/srv/eng/catalog.search#/metadata/7213b4cf-71a3-4920-b22c-2923de313cb5&rft.title=RV Investigator Voyage IN2018_V05 EM122 Multibeam Echosounder Data&rft.identifier=7213b4cf-71a3-4920-b22c-2923de313cb5&rft.publisher=Australian Ocean Data Network&rft.description=This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_V05, 'How does a standing meander southeast of Tasmania brake the Antarctic Circumpolar Current?' which departed Hobart on the 16th October 2018 and returned to Hobart on the 16th November 2018. The objectives of the voyage included: (1) Deployment of a fleet of EM-APEX profiling floats, (2) Deployment of a tall mooring at the crest of a meander in the Polar Front of the Antarctic Circumpolar Current, (3) Full-depth hydrographic survey of the physics and biogeochemistry of the targeted ACC meander, conducting transects across the front and (4) Triaxus transects across and along the front. The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter from Hobart to Hobart with particular emphasis on the scientific study area bounded between the following approximate coordinates: 54.156° to 57.344° (South) and 148.577° to 156.344° (East). The sonar was set to passive mode during sensitive VMP deployment periods of the voyage in the ACC, when acoustic silent periods were requested by the science party. 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 597 files totalling 18.6 GB of raw data in the 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.Progress Code: completedMaintenance and Update Frequency: asNeededStatement: Original field data. Processed data are SV corrected, tide not corrected and edited using CARIS version 10.3&rft.creator=Anonymous&rft.date=2016&rft.coverage=westlimit=147.348; southlimit=-57.344; eastlimit=156.344; northlimit=-42.887; projection=WGS 84 (EPSG:4326)&rft.coverage=westlimit=147.348; southlimit=-57.344; eastlimit=156.344; northlimit=-42.887; projection=WGS 84 (EPSG:4326)&rft_rights=Attribution 4.0 https://creativecommons.org/licenses/by/4.0/&rft_rights=&rft_rights=Data is made available under a Creative Commons Attribution 4.0 International Licence, please see link. Data is supplied 'as is' without any warranty or guarantee except as required by law to be given to you. The data may not be free of error, comprehensive, current or appropriate for your particular purpose. You accept all risk and responsibility for its use. ATTRIBUTION STATEMENT: The dataset [Insert-dataset-name-here] downloaded on [Insert-DD-Mmm-YYYY-here] was collected on voyage [Insert-voyage-name-here] by the Marine National Facility.&rft_subject=oceans&rft_subject=geoscientificInformation&rft_subject=Ship: Investigator (RV)&rft_subject=Marine National Facility&rft_subject=Research Voyage: IN2018_V05&rft_subject=Earth Science | Oceans | Bathymetry/Seafloor Topography&rft_subject=Global / Oceans | Southern Ocean/ Australia extension&rft_subject=Global / Oceans&rft_subject=Coastal Waters (Australia) | Tasmania Coast, TAS&rft_subject=Marine Features (Australia) | Derwent Estuary, TAS&rft_subject=Multibeam Echosounder - EM122&rft_subject=Sea-floor depth below surface of the water body&rft_subject=Sea-floor surface hardness&rft_subject=Density of the water body&rft_subject=multi-beam echosounders&rft_subject=research vessel&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0
https://creativecommons.org/licenses/by/4.0/

Data is made available under a Creative Commons Attribution 4.0 International Licence, please see link. Data is supplied 'as is' without any warranty or guarantee except as required by law to be given to you. The data may not be free of error, comprehensive, current or appropriate for your particular purpose. You accept all risk and responsibility for its use. ATTRIBUTION STATEMENT: The dataset [Insert-dataset-name-here] downloaded on [Insert-DD-Mmm-YYYY-here] was collected on voyage [Insert-voyage-name-here] by the Marine National Facility.

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This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_V05, 'How does a standing meander southeast of Tasmania brake the Antarctic Circumpolar Current?' which departed Hobart on the 16th October 2018 and returned to Hobart on the 16th November 2018. The objectives of the voyage included: (1) Deployment of a fleet of EM-APEX profiling floats, (2) Deployment of a tall mooring at the crest of a meander in the Polar Front of the Antarctic Circumpolar Current, (3) Full-depth hydrographic survey of the physics and biogeochemistry of the targeted ACC meander, conducting transects across the front and (4) Triaxus transects across and along the front.

The Kongsberg EM122 multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter from Hobart to Hobart with particular emphasis on the scientific study area bounded between the following approximate coordinates: 54.156° to 57.344° (South) and 148.577° to 156.344° (East). The sonar was set to passive mode during sensitive VMP deployment periods of the voyage in the ACC, when acoustic silent periods were requested by the science party.

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 597 files totalling 18.6 GB of raw data in the 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.

Lineage

Progress Code: completed
Maintenance and Update Frequency: asNeeded
Statement: Original field data. Processed data are SV corrected, tide not corrected and edited using CARIS version 10.3

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156.344,-42.887 156.344,-57.344 147.348,-57.344 147.348,-42.887 156.344,-42.887

151.846,-50.1155

text: westlimit=147.348; southlimit=-57.344; eastlimit=156.344; northlimit=-42.887; projection=WGS 84 (EPSG:4326)

Subjects
Coastal Waters (Australia) | Tasmania Coast, TAS | Density of the water body | Earth Science | Oceans | Bathymetry/Seafloor Topography | Global / Oceans | Global / Oceans | Southern Ocean/ Australia extension | Marine Features (Australia) | Derwent Estuary, TAS | Marine National Facility | Multibeam Echosounder - EM122 | Research Voyage: IN2018_V05 | Sea-floor depth below surface of the water body | Sea-floor surface hardness | Ship: Investigator (RV) | geoscientificInformation | multi-beam echosounders | oceans | research vessel |

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Other Information
Geophysical Survey and Mapping website information for this data set and link to downloading data. (Geophysical Survey and Mapping website information for this data set)

url : https://www.marine.csiro.au/data/gsm/gsm_extract.cfm?survey=IN2018_V05&instrument=EM122

RV Investigator survey information including voyage plans and summaries (RV Investigator survey information)

url : https://www.marine.csiro.au/data/trawler/survey_list.cfm?source_id=309

Marine National Facility home page (MNF home page)

url : https://mnf.csiro.au/

Geophysical Survey and Mapping acquisition report

url : https://www.marine.csiro.au/data/gsm/get_report.cfm?survey=in2018_v05

Identifiers
  • global : 7213b4cf-71a3-4920-b22c-2923de313cb5