Processed shipboard bathymetry and high resolution bathymetry acquired during the ROVSMOOTH, 2016-2017 cruise of RV Pourquoi Pas?

Cannat, Mathilde, Prampolini, Mariacristina, Mahato, Souradeep and Boutbien, Michel, 2024. Processed shipboard bathymetry and high resolution bathymetry acquired by Remotely Operated Vehicle VICTOR 6000 during the ROVSMOOTH, 2016-2017 cruise of RV Pourquoi Pas?
Shipboard bathymetry data were acquired during the ROVSMOOTH cruise onboard RV Pourquoi Pas?, with a RESON 7150 multibeam echosounder (12 KHz frequency, beam opening angle of 151°, and a ship velocity of 6 knots). The processed grid (50 m grid spacing; GEOTIFF file: batshipROVSMOOTH.tif) was produced with the Caraibes 5.0 software (@Ifremer).
High-resolution bathymetry data were acquired during three dives of ROV Victor 6000 (dives 01-639, 04-642 and 12-650) using a RESON 7125 echosounder mounted on the ROV frame, with an operating frequency of 400 kHz, a beam opening angle of 120°, a velocity of ~0.3 m/s, and maintaining an altitude ~50 m above the seafloor. Ultra-short baseline ROV positioning was poor due to the steep and irregular slopes. The processes grids (1 m grid spacing; GEOTIFF files: ROVSMOOTH_12_650_lowerslopes_recale.tif, ROVSMOOTH_04_642_AND_12_650_upperslopes_recale.tif, ROVSMOOTH_01_639_recale.tif) were therefore produced in two steps: first grids were produced for each ROV track with the Caraibes 5.0 software (@Ifremer); then these track by track grids were manually adjusted with the GlobalMapper software (@BlueMarble) and exported as GEOTIFF files.