Data

IN2021_V02 Southern Ocean Time Series Bathymetry 10m - 210m Multi-resolution AusSeabed products

Commonwealth Scientific and Industrial Research Organisation
Shadwick, Elizabeth ; Vandenbossche, Phil ; Boyd, Matt ; Navidad, Cisco ; Gifford, Davina
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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=info:doi10.25919/xqpt-9j87&rft.title=IN2021_V02 Southern Ocean Time Series Bathymetry 10m - 210m Multi-resolution AusSeabed products&rft.identifier=10.25919/xqpt-9j87&rft.publisher=Commonwealth Scientific and Industrial Research Organisation (CSIRO)&rft.description=This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2021_V02 titled SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania. The voyage took place between April 14 and April 28, 2021, departing from Hobart (TAS) and arriving in Hobart (TAS). The purpose of this voyage was to first deploy a new set of SOTS moorings (SOFS-9 and SAZ-22) and then recover the existing SOTS moorings (SOFS-8 and SAZ-21). This dataset is published with the permission of CSIRO. Not to be used for navigational purposes. The dataset contains bathymetry grids of 10m to 210m resolution of the Southern Ocean Time Series produced from the processed EM122 and EM710 bathymetry data.Multibeam data was logged from the EM’s in Kongsberg’s proprietary *.all format and was converted to be processed within CARIS HIPS and SIPS version 11.3.8. Following the initial data conversion into the HIPS and SIPS format, the data was analysed for noise. No tide was applied, and the soundings were reduced to the EGM2008 model using logged ellipsoid referenced heights in the raw data files. Lines were georeferenced using the vessel file appropriate for either the EM122 or EM710. The data were then gridded at the highest resolution possible (generally between 50 m and 75 m for the EM122) and further inspected for outliers. The data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.&rft.creator=Shadwick, Elizabeth &rft.creator=Vandenbossche, Phil &rft.creator=Boyd, Matt &rft.creator=Navidad, Cisco &rft.creator=Gifford, Davina &rft.date=2023&rft.edition=v1&rft.coverage=northlimit=-43.0000; southlimit=-48.0000; westlimit=140.5000; eastLimit=147.6500; uplimit=-5151.645996; downlimit=-15.516912; projection=WGS84&rft_rights=All Rights (including copyright) CSIRO 2023.&rft_rights=Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/&rft_subject=AusSeabed&rft_subject=MNF&rft_subject=CSIRO&rft_subject=Surveying (incl. hydrographic surveying)&rft_subject=Geomatic engineering&rft_subject=ENGINEERING&rft_subject=Marine geoscience&rft_subject=Geology&rft_subject=EARTH SCIENCES&rft.type=dataset&rft.language=English Access the data
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https://creativecommons.org/licenses/by/4.0/

All Rights (including copyright) CSIRO 2023.

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Data is accessible online and may be reused in accordance with licence conditions

Brief description

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2021_V02 titled "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania". The voyage took place between April 14 and April 28, 2021, departing from Hobart (TAS) and arriving in Hobart (TAS).

The purpose of this voyage was to first deploy a new set of SOTS moorings (SOFS-9 and SAZ-22) and then recover the existing SOTS moorings (SOFS-8 and SAZ-21).

This dataset is published with the permission of CSIRO. Not to be used for navigational purposes.

The dataset contains bathymetry grids of 10m to 210m resolution of the Southern Ocean Time Series produced from the processed EM122 and EM710 bathymetry data.

Lineage

Multibeam data was logged from the EM’s in Kongsberg’s proprietary *.all format and was converted to be processed within CARIS HIPS and SIPS version 11.3.8. Following the initial data conversion into the HIPS and SIPS format, the data was analysed for noise. No tide was applied, and the soundings were reduced to the EGM2008 model using logged ellipsoid referenced heights in the raw data files. Lines were georeferenced using the vessel file appropriate for either the EM122 or EM710. The data were then gridded at the highest resolution possible (generally between 50 m and 75 m for the EM122) and further inspected for outliers.

The data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.

Data time period: 2021-04-14 to 2021-04-27

This dataset is part of a larger collection

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Subjects
AusSeabed | CSIRO | Earth Sciences | Engineering | Geology | Geomatic Engineering | MNF | Marine Geoscience | Surveying (Incl. Hydrographic Surveying) |

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