Casey Station Multibeam Surveys 2013-2015 (GA-4415, GA-0348 - AAD 3326) - High Resolution Bathymetry Grid

• Other Authors: Commonwealth of Australia (Geoscience Australia) (hasAssociationWith), Manager Client Services (distributor), Manager Client Services (owner), Manager Client Services (pointOfContact), Spinoccia, M. (owner), Spinoccia, M. (processor), Spinoccia, M. (pointOfContact)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: geoscientificInformation; HVC_144641; AusSeabed; Bathymetry; Multibeam; Marine; Marine Survey; Antarctica; Published_External; Antarctic; Casey Station; Burton; Wyatt; Wyatt Earp; Antarc*; Australian Antarctic Division
• Online Access: https://researchdata.edu.au/casey-station-multibeam-bathymetry-grid/1880364; https://pid.geoscience.gov.au/dataset/ga/100885; https://doi.org/10.4225/25/587c1c94d6b1b

Maintenance and Update Frequency: asNeeded Statement: The Casey Station bathymetry grid was created by compiling two bathymetry surveys. The GA-4415 survey was conducted by the Royal Australian Navy (RAN) and the Australian Antarctic Division (AAD) onboard the RAN vessel Wyatt Earp in the summer of 2013/2014, while GA-0348 survey was a collaboration between Geoscience Australia (GA) , the Royal Australian Navy and Australian Antarctic Division acquired by the AAD workboat Howard Burton during December 2014 to February 2015. The bathymetry data was processed onboard and further processing was conducted in Geoscience Australia by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. 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 artefacts. 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-49S. 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 artefacts 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 ...