IEDA: Marine Geoscience Data System IEDA
High-resolution bathymetric data (netCDF grid format) of the head of Baker fjord and of Steffen fjord (Chilean Patagonia, 48°S)
The bathymetry was mapped with an ELAC Seabeam 1050 multibeam system in austral winter 2016. A mounting frame holding two 50 kHz transducers at a 120-degree angle, was installed at the bow of the R/V Sur Austral (COPAS Sur-Austral, Chile). In order to correct for roll, pitch, and heave movements, an Octans Motion Sensor (IXSEA) was placed on the mounting pole above the transducers. CTD measurements were continuously recorded at the water surface (approximately 1 m depth) using a Valeport Modus CTD. To correct for sound velocity changes with depth, a total of 24 vertical CTD profiles were taken with an RBR Maestro, operated at a sampling rate of 6 Hz and vertical speed of 1 m/s. The multibeam data were processed with Caris HIPS and SIPS v9.1, including tide correction based on tide tables at Caleta Tortel (maximum tidal range of 1.9 m). The final bathymetric maps and grids were created using Fledermaus v7 and GMT. The data files are in netCDF grid format (GDAL and COARDS-compliant "nf" versions) and are suitable for import to GMT scripts.
Vandekerkhove, Elke
Investigator
Ghent University
Bertrand, Sebastien
Investigator
Ghent University
Crescenzi-Lanna, Eleonora
Investigator
Ghent University
De Rycker, Koen
Investigator
Ghent University
Mansilla, Rodrigo
Investigator
Universidad de Concepción
Device Info
Sonar:Multibeam
SeaBeam:1050
Platform
Sur Austral
Universidad de Concepción
Quality
2
The data have been processed/modified to a level beyond that of basic quality control (e.g. final processed sonar data, photo-mosaics).

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