IN2020_E01 Tasmanian Coast Bathymetry 10m - 210m Multi-resolution AusSeabed products

Brief description

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2020_E01 titled "Trials and Calibration". The voyage took place between July 29 and August 6, 2020, departing from Hobart (TAS) and arriving in Hobart (TAS).

The purpose of this voyage was to undertake post port-period equipment calibrations and commissioning, sea trials as well as personnel training.

This dataset is published with the permission of CSIRO. Not to be used for navigational purposes.

The dataset contains bathymetry grids of 10m to 210m resolution of the Tasmanian Coast produced from the processed EM122 and EM710 bathymetry data.
Lineage: 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 10.4. Initial data conversion and processing was performed using the GSM python batch utility, with the manual method used for importing patch test data. Once the raw files were converted into the HIPS and SIPS format, the data was analysed for noise. With the exception of EM710 reference surface lines (files 0083, 0085, 0087, 0090, 0092, 0096, 0098, 0100 & 0103) and EM710 patch test lines (files 0031, 0033, 0035, 0037, 0040, 0042, 0044) that had GPS tide applied, no tide was applied to the remaining lines. All lines were merged using the vessel file appropriate for either the EM122 or EM710. Because the angular offsets were zeroed in SIS prior to the EM710 and EM122 patch tests, the vessel files for each were edited to apply the calibration values to those lines.

The data was then gridded at the highest resolution possible and further inspected for outliers.

The 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.