Tuning the CARIS implementation of cube for Patagonian waters
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This thesis is focused on optimizing the use of the CARIS implementation of CUBE (Combined Uncertainty and Bathymetry Estimator) for Chilean bathymetric data acquired in the Patagonian area.
The Chilean Hydrographic Office (SHOA) processes its multibeam data using interactive editing with CARIS HIPS software. To reduce the time consumed in this process and to avoid subjective decisions made by the operators, HIPS has semiautomated filters included. The latest CARIS technology uses the CUBE results for data filtering purposes. Thus the depth estimation made by the CUBE algorithm is stored in a CARIS BASE (Bathymetry with Associated Statistical Error) surface. Soundings that are inconsistent with this generated surface can be flagged as "not for use". CUBE assumes a flat bottom in the depth estimation. The extreme seafloor morphology in Patagonian waters decreases the CUBE efficiency. A possible solution is changing its default parameters to make it more suitable for this kind of terrain and to enhance the efficiency of the CARIS filter.
TPE (Total Propagated Error) values are necessary to run CUBE. For this research, they were obtained by replacing the parameters of an existing "Device Model"
within HIPS with the proper sonar information from the manuals and the manufacturer of ATLAS FANSWEEP 20 (200 kHz).