IN2018_V05 Southern Ocean Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2018_V05 titled "How does a standing meander southeast of Tasmania brake the Antarctic Circumpolar Current?". The voyage took place between October 16 and November 16, 2018, departing from Hobart (TAS) and arriving in Hobart (TAS).\n\nThe purpose of this voyage was to combine a full-depth CTD/LADCP and bathymetric survey of the full meander, with targeted, rapid underway sampling of smaller-scale variability using the Triaxus towed CTD, a VMP-2000 microstructure profiler and underway instruments.\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 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 10.3.1. Initial data conversion and processing was performed using the python batch utility. As soon as files were copied to the processing PC (CARIS2) from the SIS acquisition machine, the data were automatically converted to the HIPS data format and merged using zerotide and the vessel file appropriate for either the EM122 or EM710. Once added to the HIPS project the data was visually analysed for noise using a combination of swath and subset editing.\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.