IN2019_V06 Timor Sea Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2019_V06, titled "Tropical observations of atmospheric convection, biogenic emissions, ocean mixing, and processes generating intra-seasonal SST variability" which departed Darwin on the 19th of October 2019 and returned to Darwin on the 17th of December 2019, consisting of two legs. Leg 1 - Darwin, 20:00, 19 October 2019 to Darwin, 19:00, 10 November 2019 Leg 2 - Darwin, 20:00, 11 November 2019 to Darwin, 08:00, 17 December 2019.\n\nThe purpose of Leg 1, at the Northwest Shelf station (121.5 E, 14 S), was the study of the merging Indonesian Throughflow (ITF) waters into the Indian Ocean, internal waves, ocean vertical mixing, wind mixing, water mass transformation, and processes contributing to SST variability.\n\nThe purpose of Leg 2, at the Warruwi station (near 133.6°E, 11.2°S), was to make near continuous measurements of the oceanic and atmospheric environment throughout the diurnal cycle as atmospheric moist convection develops, or does not develop, in the range of the Investigator weather radar. \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 - 210m resolution of the Timor Sea and Arafura Sea study area produced from the processed EM122 and EM710 bathymetry data.\n\nLineage: Leg 1:\nMultibeam 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 GSM python batch utility. Once the raw files were converted into the HIPS and SIPS format the data was analysed for noise. Zerotide was applied, and the lines were merged using the vessel file appropriate for either the EM122 or EM710. The data was then gridded at the highest resolution possible and further inspected for outliers.\n\nLeg 2: \nMultibeam data was logged from the EM’s in Kongsberg’s proprietary *.all format and was converted to be processed within CARIS HIPS and SIPS 10.3.1. Raw files were converted into the HIPS and SIPS format and the data was QC’d in swath editor. A GPS Tide for all data was calculated based on the Applanix PosMV Marinestar G4+ Ellipsoidal heights and the Ausgeoid09 geoid model. This GPS Tide was smoothed at 600sec and applied to the data in the merge process. The lines were merged using the EM710 vessel file. The data was then gridded at 2m and further inspected for outliers. Some lines have been edited for speed of sound errors using the refraction editor and/or re-applying sound velocity. \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.