Authors / CoAuthors
Abstract
This resource includes seabed backscatter data for South-west Corner Marine Park collected by Geoscience Australia during the periods 9 – 12 March 2020 and 27 January – 16 February 2021 on the charter vessel Santosha. The survey was undertaken as a collaborative project with the University of Western Australia, the University of Tasmania and the Australian Centre for Field Robotics (University of Sydney) and funded through the National Environmental Science Program Marine Biodiversity Hub, with co-investment by all partners and the Director of National Parks. The purpose of the project was to build baseline information for benthic habitats on the continental shelf in the marine park that will support ongoing environmental monitoring within the South-west Marine Park Network as part of the 10-year management plan (2018-2028). Data acquisition for the project included multibeam bathymetry and backscatter for an area covering 330 km^2 offshore from Cape Naturaliste to Cape Leeuwin coast, with underwater imagery of benthic communities and demersal fish collected by University of Western Australia on separate field deployments. This backscatter dataset contains a 4 m resolution 32-bit geotiff file of the survey area produced from the processed Kongsberg EM2040C multibeam sonar system data using the CMST-GA MB Process v15.04.04.0 (.64) toolbox software co-developed by the Centre for Marine Science and Technology at Curtin University and Geoscience Australia. For further information see: Giraldo-Ospina, A. et al., 2021. South-west Corner Marine Park Post Survey Report. Report to the National Environmental Science Program, Marine Biodiversity Hub.
Product Type
dataset
eCat Id
145282
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
- Contact instructions
- PSCD
Resource provider
Keywords
- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCES
- ( Theme )
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- Marine
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- Backscatter
- ( Instrument )
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- Multibeam
- ( Product )
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- Backscatter grids
- ( Project )
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- AusSeabed
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- Published_Internal
Publication Date
2020-09-22T22:44:49
Creation Date
Security Constraints
Legal Constraints
Status
completed
Purpose
South-west Corner Marine Park survey
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
The South-west Corner Marine Park Survey 2020 & 2021, GA-4858 was acquired by Geoscience Australia (GA) and CSIRO during the periods 9 – 12 March 2020 (led by Dr. Scott Nichol) and 27 January – 16 February 2021 (led by Mr Aero Leplastrier) on the charter vessel Santosha. This dataset was acquired using Kongsberg's SIS acquistion software and processed using CMST-GA MB Process v15.04.04.0 software by Justy Siwabessy. Processing: 1. Multibeam data were collected using a Kongsberg EM2040C multibeam echosounder system, mounted in the moon pool of the charter vessel Santosha. Motion referencing and navigation data were collected with an Applanix Position and Orientation system and a C-Nav GPS system, respectively. Multibeam data were acquired using Kongsberg’s Seabed Information System (SIS) software. 2. These data were processed using the multibeam backscatter CMST-GA MB Process v15.04.04.0 (x64) toolbox software co-developed by the Centre for Marine Science and Technology (CMST) at Curtin University of Technology and GA (described in Gavrilov et al., 2005; Parnum and Gavrilov 2011). 3. The process involved removal of the system transmission loss, removal of the system model, calculation of the incidence angle, correction of the beam pattern, calculation of the angular backscatter response within a sliding window of 300 pings with a 50% overlap in a 1° bin, removal of the angular dependence, and restoration to the backscatter strength at an angle of 25°. The final processed backscatter data were then gridded to 4 m horizontal resolution and exported for display and analysis. In GA, further process was conducted by Justy Siwabessy to fine tune beam pattern correction and to combine with data acquired in 2021. 4. The processed data was finally exported as grids in the optimum resolution the data can provide.
Parent Information
Extents
[-34.1421, -33.8174, 114.7068, 114.9973]
Reference System
WGS 84 (EPSG:4326)
Spatial Resolution
5m
Service Information
Associations
Downloads and Links
Source Information