Data

Oceanic Shoals Commonwealth Marine Reserve - High Resolution Multibeam Acoustic Backscatter Grids

Geoscience Australia
Siwabessy, J. ; Picard, K.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/f21824a7-8db2-5c00-e044-00144fdd4fa6&rft.title=Oceanic Shoals Commonwealth Marine Reserve - High Resolution Multibeam Acoustic Backscatter Grids&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/79007&rft.publisher=Geoscience Australia&rft.description=This resource contains bathymetry and backscatter data for the Oceanic Shoals Commonwealth Marine Reserve (CMR) in the Timor Sea collected by Geoscience Australia during September and October 2012 on RV Solander (survey GA0339/SOL5650). The survey used a Kongsberg EM3002 300 kHz multibeam sonar system mounted in single head configuration to map four areas, covering a combined area of 507 square kilometres. Data are gridded to 2 m spatial resolution. The Oceanic Shoals Commonwealth Marine Reserve survey was undertaken as an activity within the Australian Government's National Environmental Research Program Marine Biodiversity Hub and was the key component of Research Theme 4 - Regional Biodiversity Discovery to Support Marine Bioregional Plans. Hub partners involved in the survey included the Australian Institute of Marine Science, Geoscience Australia, the University of Western Australia, Museum Victoria and the Museum and Art Gallery of the Northern Territory. Data acquired during the survey included: multibeam sonar bathymetry and acoustic backscatter; sub-bottom acoustic profiles; physical samples of seabed sediments, infauna and epibenthic biota; towed underwater video and still camera observations of seabed habitats; baited video observations of demersal and pelagic fish, and; oceanographic measurements of the water column from CTD (conductivity, temperature, depth) casts and from deployment of sea surface drifters. Further information on the survey is available in the post-survey report published as Geoscience Australia Record 2013/38 (Nichol et al. 2013).Maintenance and Update Frequency: asNeededStatement: The backscatter data were processed using CMST-GA MB Process v10.10.17.0 software. The fully processed backscatter strengths were corrected for transmission loss and insonification area. The process within the toolbox also involved removal of the system transmission loss, removal of the system model, calculation of the incidence angle and removal of the angular dependence. The grid values are basically the average values of the processed backscatter point data within each grid cell of predefined size, normalised to the backscatter strength at an angle of 25 degrees.&rft.creator=Siwabessy, J. &rft.creator=Picard, K. &rft.date=2014&rft.coverage=westlimit=126.89; southlimit=-12.23; eastlimit=127.48; northlimit=-11.31&rft.coverage=westlimit=126.89; southlimit=-12.23; eastlimit=127.48; northlimit=-11.31&rft_rights=Creative Commons Attribution-NonCommercial 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=geoscientificInformation&rft_subject=Marine Data&rft_subject=Backscatter Grid&rft_subject=backscatter&rft_subject=geoscience&rft_subject=marine environmental baselines&rft_subject=multibeam&rft_subject=NERP Marine Biodiversity Hub&rft_subject=marine&rft_subject=NERP&rft_subject=AU-WA&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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This resource contains bathymetry and backscatter data for the Oceanic Shoals Commonwealth Marine Reserve (CMR) in the Timor Sea collected by Geoscience Australia during September and October 2012 on RV Solander (survey GA0339/SOL5650). The survey used a Kongsberg EM3002 300 kHz multibeam sonar system mounted in single head configuration to map four areas, covering a combined area of 507 square kilometres. Data are gridded to 2 m spatial resolution. The Oceanic Shoals Commonwealth Marine Reserve survey was undertaken as an activity within the Australian Government's National Environmental Research Program Marine Biodiversity Hub and was the key component of Research Theme 4 - Regional Biodiversity Discovery to Support Marine Bioregional Plans. Hub partners involved in the survey included the Australian Institute of Marine Science, Geoscience Australia, the University of Western Australia, Museum Victoria and the Museum and Art Gallery of the Northern Territory. Data acquired during the survey included: multibeam sonar bathymetry and acoustic backscatter; sub-bottom acoustic profiles; physical samples of seabed sediments, infauna and epibenthic biota; towed underwater video and still camera observations of seabed habitats; baited video observations of demersal and pelagic fish, and; oceanographic measurements of the water column from CTD (conductivity, temperature, depth) casts and from deployment of sea surface drifters. Further information on the survey is available in the post-survey report published as Geoscience Australia Record 2013/38 (Nichol et al. 2013).

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Maintenance and Update Frequency: asNeeded
Statement: The backscatter data were processed using CMST-GA MB Process v10.10.17.0 software. The fully processed backscatter strengths were corrected for transmission loss and insonification area. The process within the toolbox also involved removal of the system transmission loss, removal of the system model, calculation of the incidence angle and removal of the angular dependence. The grid values are basically the average values of the processed backscatter point data within each grid cell of predefined size, normalised to the backscatter strength at an angle of 25 degrees.

Issued: 2014

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127.48,-11.31 127.48,-12.23 126.89,-12.23 126.89,-11.31 127.48,-11.31

127.185,-11.77

text: westlimit=126.89; southlimit=-12.23; eastlimit=127.48; northlimit=-11.31

Subjects
AU-WA | Backscatter Grid | Environmental Sciences | Marine Data | NERP | NERP Marine Biodiversity Hub | Published_External | backscatter | geoscience | geoscientificInformation | marine | marine environmental baselines | multibeam |

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Other Information
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Identifiers
ACN 633 798 857