Cruises

"La Lune" 2012

posted 26 Jan 2013, 00:47 by Pere Ridao Rodríguez

GIRONA500 AUV explores “La Lune”, a french  wreck of the XVII century

 
During the last week of August 2012 CIRS UdG-Team has been exploring an ancient wreck in the coast of Toulon. “La Lune”,  was a ship of the french royal navy of the young king Louis XIV, sunken on November the 8th 1664 with about 800 men on board. The wreck lays around 90 m. depth in the Coast of Toulon, and it is very well conserved. An optical survey reveals that its canons and other utensiles are still in very well conditions.

CIRS UdG-Team has been contracted by a documentary producer to set up a preliminary optical cartography of the site to be used for the documentary under production.

The survey took place the last week of August on board the “Bon Pigall” boat belonging to the Argomaris private foundation. The Work was supervised by Michel l’Hour director of the DRASSM (Département des recherches archéologiques subaquatiques et sous-marines). Two robots were used, a Lynx ROV property of Argomaris as well a GIRONA500 AUV property of CIRS. The last one was endowed with a multibeam sonar profilers as well as with two stereo pairs, one using a bumblebee stereocam and the other one, a CIRS creation using two 21Mp (each) photographic cameras which were able to gather wreck images of astonishing quality.

CALDERA2012

posted 26 Jan 2013, 00:44 by Pere Ridao Rodríguez   [ updated 26 Jan 2013, 00:52 ]

GIRONA500 AUV explores an underwater vulcano in Santorini

The Caldera 2012 cruise took place between the 13 and the 23 of July within the caldera of Santorini (Greece) onboard R/V AEGAEO (HCMR, Greece). This project is funded through European Commission EUROFLEETS funding scheme (www.eurofleets.eu, grant n. 228344).

The main goals of the Caldera 2012 project are:
• The validation of the AUV “GIRONA500” for routine scientific operations. This AUV is equipped with a multibeam sonar system for high resolution acoustic seafloor mapping as well as with cameras for seafloor imaging. Application of opto/acoustic imaging techniques to build photomosaics, micro-bathymetries and 3D topography reconstruction.
• The characterization of hydrothermal activity within the caldera: optical maps of actively venting areas, water column in situ analyses with a marinized spectrometer, hydrothermal fluid sampling, and monitoring of temporal variations in hydrothermal activity.
The project consortium is formed by 4 institutions: l'Institut de Physique du Globe de Paris (PGP), the Hellenic Center of Marine Research (HCMR), Woods Hole Oceanographic Institution (WHOI) and the University of Girona (UdG).

AUV Missions.

During the cruise the GIRONA500 AUV targeted two sites of scientific interest: the northern basin hydrothermal vent site and the lava tongue descending from there up to the bottom of the caldera.
The undertaken missions included a multi-beam survey of the lava tongue, at 15 m. altitude, descending from 280 m. up to 350 m depth in the northern part of the crater. It also performed a joint multi-beam and monocular survey, at 4 m. altitude, while acquiring chemical data using the WHOI mass spectrometer.
The work took place on board the Greek AEGAEO oceanographic ship of the Hellenic Center of Marine Resarch which is also equipped with a ROV (MAXROVER) and a HOV (THETIS).

UdG Contribution

The UdG team contributed to the project providing the AUV, as well as high resolution optical and acoustic mapping capabilities. During the following weeks, the data gathered with the underwater robots will be used to set-up high acurate 2D photomosaics, 2.5D micro-bathymetries and 3D reconstructions of selected sites of geological interest, to assist the geological studies.

GIRONA500 becomes Operational 

One of the main goals of the UdG team consisted in testing and validating the recently developed AUV, as an operative vehicle for rutinary scientific operations. The cruise results confirm our robot as an operational AUV which has been able to repetitively dive bellow the 300 m. depth reaching the deepest area of the caldera at 380 m.

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