Product catalogue
Davis Multibeam Survey 2016/17, Antarctica (GA-0357/AAP 5093) - High Resolution Backscatter Grid
<p>Geoscience Australia, the Royal Australian Navy (RAN) and the Australian Antarctic Division (AAD) conducted a hydrographic surveying and seafloor characterisation survey in nearshore waters offshore from Davis Station in the Australian Antarctic Territory.
<p>The multibeam data was acquired during January-February 2017 using two workboats. Geoscience Australia used the AAD workboat Howard Burton and the Royal Australian Navy used their Antarctic Survey Vessel (ASV) Wyatt Earp. The survey is a component of Australian Antarctic Program (AAP) Project 5093 Hydrographic Surveying and Seafloor Characterisation Program (Chief Investigator: Ursula Harris, AAD).
<p>The objective of the survey was to map the seabed environment in shallow (<300 m) coastal waters adjacent to Davis station in the Vestfold Hills region, to obtain data for the compilation of nautical charts and to acquire fundamental baseline data necessary for informed environmental management, science, infrastructure and logistical operations.
<p>Data collected during the survey includes high-resolution multibeam bathymetry and backscatter data, sediment samples, seafloor imagery and sub-bottom profiles.
<p>This dataset comprises a backscatter grid from multibeam sonar data acquired using the AAD workboat Howard Burton, gridded at 2 m spatial resolution, covering a combined area of 90 km2. The Chief Scientist onboard the Howard Burton was Dr. Jodie Smith (Geoscience Australia).
Simple
Identification info
- Date (Creation)
- 2019-08-12
- Date (Publication)
- 2019-08-20T02:02:35
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/130644
- Citation identifier
- Digital Object Identifier/http://dx.doi.org/10.26186/5d5b56ea20858
- Cited responsible party
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Role Organisation / Individual Name Details Author Siwabessy, J.
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Siwabessy, J.
Resource provider Environmental Geoscience Division
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
Temporal extent
- Time period
- 2017-01-10 2017-02-06
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Theme
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backscatter
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- Keywords
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antarctica
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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ESRI Ascii data
ESRI Ascii data
- Distribution format
-
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ESRI Ascii
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- OnLine resource
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ESRI gridded data
ESRI gridded data
- Distribution format
-
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ESRI gridded
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- OnLine resource
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Imagery
Imagery
- Distribution format
-
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png
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- OnLine resource
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Google Earth data
Google Earth data
- Distribution format
-
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kml
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- OnLine resource
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Metadata
Metadata
- Distribution format
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txt
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Resource lineage
- Statement
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This dataset was acquired using Kongsberg's SIS acquisition software and pre-processed onboard using CMST-GA MB Process v15.04.04.0 software by Kim Picard.
Processing:
1. Multibeam data were collected using a Kongsberg EM2040C multibeam echosounder system, mounted in the moon pool of the Workboat Howard Burton. 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 100 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 2 m horizontal resolution and exported for display and analysis.
In GA, further process was conducted by Justy Siwabessy to fine tune beam pattern correction.
4. The processed data was finally exported as a grid in the optimum resolution the data can provide.
Metadata:
The multibeam bathymetry was acquired by the following survey:
- Survey Name: Davis Station Marine Survey 2016 (GA-0357)
- Vessel Name: AAD Workboat Howard Burton
- Institutions: GA, RAN, AAD
- Country: Australia
- Operator: AAD
- Multibeam system: Kongsberg EM2040C
- Year of installation: 2014
- Nominal sonar frequency: 300 kHz
- Number of beams: 400 beams
- Beamwidth across track: 1.3°
- Beamwidth along track: 1.3°
- Pulse length: variable
- Selectable depth range: 0.5m - 450m
- Vessel speed: 6 - 8 knots
- Start Date: 10/01/2017
- End Date: 06/02/2017
- Start Port: Davis Station
- End Port: Davis Station
- Processing software: CMST-GA MB Process v15.04.04.0
- Grid resolution: 2m
- Number of grids: 1
- Total surface coverage: 90 km2
- Horizontal Datum: WGS84 UTM-43S
This dataset is published with the permission of the CEO, Geoscience Australia
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/b066c962-5e33-472a-a803-ae46ec0180b2
- Title
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GeoNetwork UUID
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Parums, R.
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/130644
- Date info (Creation)
- 2019-07-08T01:05:42
- Date info (Revision)
- 2019-07-08T01:05:42
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/130301