IN2024_V02 Southern Ocean Time Series Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2024_V02 titled "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania". The voyage took place between March 31 and April 19, 2024, departing from Hobart (TAS) and arriving in Hobart (TAS).\n\nThe purpose of this voyage was to maintain the Southern Ocean Time Series (SOTS) automated moorings, a sub-facility of the Integrated Marine Observing System (IMOS). IMOS is a global monitoring program to collect long time-series ocean data to better understand ocean and climate change and variability. IMOS, like the MNF, is supported by funding via the NCRIS program.\n\nThis dataset is published with the permission of CSIRO. Not to be used for navigational purposes.\n\nThe dataset contains bathymetry grids of 10m to 210m resolution of the Southern Ocean Time Series produced from the processed EM122 and EM710 bathymetry data.\nLineage: Multibeam data was logged from the EM’s in Kongsberg’s proprietary *.all format and was converted to be processed within CARIS HIPS and SIPS version 11.4.30. Data were imported into the HIPS project using EM Height and the vessel file appropriate for either the EM122 or EM710. GPS tide was computed using the EGM2008 model EGM_2008_1Min_Aust_WGS84.csar. TPU values were computed using Measured Sound Velocity = 0.5 and Surface Sound Velocity = 0.2. Caris sound velocity files (.svp) were extracted as part of the georeferencing process.\n\nThe raw files were analysed for noise and cleaned manually. \n\nThe data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.