Authors / CoAuthors
Spinoccia, M. | Buchanan, C.
Abstract
The Jervis Bay Multibeam 2 survey, was acquired by Geoscience Australia after the purchase of the new shallow bathymetry acquisition systems Kongsberg EM3002D. This system is a mobile and compact system that can be installed on different vessels. This survey was acquired by the DSTO vessel, RV Kimbla during the 31st of May to the 5 of June 2008. The survey location was in Jervis Bay. The aim of the survey was to test the new bathymetry acquisition system and to acquire geophysical data on the shallow water (less than 100m water depth) seabed environment. The bathymetry grids are of 1m resolution projected in Easting and Northing WGS84 UTM 56S
Product Type
dataset
eCat Id
76220
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- Marine DataBathymetry Grid
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- bathymetry
- ( Theme )
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- continental shelf
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- marine survey
- ( Theme )
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- marine
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- NERP
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- AU-ACTAU-NSW
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2013-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
The multibeam bathymetry was acquired by the following survey: - Survey Name: GA-0305 Jervis Bay Multibeam 2 - Vessel Name: HMAS Kimbla - Institution: Geoscience Australia - Country: Australia - Operator: GA - Multibeam system: Kongsberg EM3002 (300 kHz) - Year of installation: 2008 - Nominal sonar frequency: 300 kHz - Number of beams: 320 beams - Beamwidth across track: 1.5 degree - Beamwidth alon track: 1.5 degree - Pulse length: variable - Operator selectable depth range: 10m - 110m - Vessel speed: 6 - 7 knots - Start Date: 31/05/2008 - End Date: 05/06/2008 - Start Port: Jervis Bay - End Port: Jervis Bay The Jervis Bay Multibema 2 survey, GA-0305 was acquired by Geoscience Australia onboard the HMAS Kimbla from the 31stof May to the 5th of June 2008. The Chief scientist onboard was Mr. Cameron Buchanan. This dataset was acquired and processed onboard by Cameron Buchanan and Michele Spinoccia and further processing was conducted in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. 1. First a vessel configuration file was created where the co-ordinates of the motion sensor and DGPS antenna and patch test offsets were recorded. 2. A new project was then created and the vessel configuration file was attached to the project file. 3. The raw swath sonar data, in raw.all format, for each line was then imported into the project and the vessel information assigned to the data. 4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artifacts. 5. Different sound velocity profiles data for each block were attached to the corresponding raw swath sonar data files to correct the depths for changes in the speed of sound through the water column. 6. Then a new blank field area was defined that specified the geographic area of study and the co-ordinate system used. The co-ordinates for the study areas were WGS84 UTM-56S. 7. The data was cleaned by applying several filters that removed any remaining spikes in the bathymetry data using user defined threshold values. A visual inspection of the data for each line was then undertaken where artifacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors modules of the Caris HIPS/SIPS software. 8. All the data for each bathymetric, motion sensor, DGPS, heading, tide and sound velocity profile data were merged to produce the final processed data file. A weighted grid of the processed data was then created for each Block. In GA the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artifacts and mismatches. 9. The processed data was finally exported as grids soundings or false colored images for presentation and reporting and as final processed data in in ASCII XYZ as well as geotif formats of 1m resolution. 10-Using CARIS Base editor 4.0 the grids were exported as ESRI ASCII grid, then imported into ARC catalogue/info to create a raster file for the entire survey.
Parent Information
Extents
[-35.08, -34.5, 150.42, 150.52]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
Geoscience Australia 150.42 150.52 -35.08 -34.5