BF2018_V01 Hope Channel Bathymetry 1m resolution Floating Point Geotiff

The collection describes a final CSIRO L3 bathymetry product as a gridded 1 metre resolution 32-bit floating point geotiff. The voyage title, 'Hydrographic survey of the Petuna Aquaculture Sites in SW Bass Strait' departed Stanley, Tasmania on the 27th June 2018 and returned to Beauty Point, Tasmania on the 4th July 2018. This survey was a part of a broader mapping campaign that involved a survey of the Boags Commonwealth Marine Reserve. The processed bathymetry data was collected on MV Bluefin Voyage BF2018_V01 with multibeam single head system Kongsberg EM2040c providing a 1.3° by 1.3° beamwidth transmit and receive angular resolution respectively. A long CW pulse was used in the deeper water areas (Boags) and a Medium CW was used in the shallower water sites (Hope Channel & SE Hummock). The bathymetry data were acquiring using Kongsberg’s SIS (Seafloor Information System) software. The echosounder's nominal frequency was 300 kHz and was operated in dual swath mode. Tide corrections were not applied to the final processed dataset. Instead the data was mapped to the ellipsoid (GPS Height) and thereafter reduced to AHD (Australian Height Datum) using the AusGeoid09 model. Processed data has had outliers removed. Auxiliary sensors included an Applanix POS MV for position and motion information (aided with a Fugro Marinestar GNSS G2 subscription signal), a Valeport MiniSVS for sound velocity at the transducer and a Valeport MiniSVP (S/N 34826) for water column sound velocity profiles. (L3 product - Variables mapped on a grid as defined by Multibeam guidelines) http://www.ausseabed.gov.au/__data/assets/pdf_file/0010/95887/Multibeam-Guidelines_v2.pdf