Antonio Angrisano, Silvio Del Pizzo, Salvatore Gaglione, Salvatore Troisi, Mario Vultaggio
The absolute positioning is the most common GNSS operational mode, being used, for instance, by ships satellite receivers; it is based on pseudorange measurements and its functional model, relating measurements to unknowns, is well defined. On the other hand the stochastic model, describing the measurement error behaviour, is currently under investigation and could be used to reduce the position errors, by defining a suitable weighting scheme. In signal-degraded scenario, as high density traffic harbours or canals, a weighted approach is especially suited, because the pseudorange accuracies...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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S. Del Pizzo, S. Gaglione, A. Angrisano, G. Salvi, S. Troisi
Vessel attitude is one of the most sensitive information in important operation. For instance, during ship cargo loading or discharge operation an un-accurate estimation of vessel attitude could compromise the safety of the procedure. Ship pith and roll parameters are directly measured by traditional sensors (bubble levels) or indirectly estimated from ship motion monitoring. Also inertial sensors, that provide a continuous attitude information, are actually used in offshore riser monitoring and dynamic positioning systems but not spread in all commercial ships. The aim of the proposed study...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Matias Carandell Widmer, Albert Garcia-Benadí, Joaquín del Río Fernandez
Marine sensors needs to be tested in real and controlled environments in order to assure, both, proper functionality of the sensor and good enough measurements. Most of times is not enough testing on the lab. Field tests and an inter-comparison with similar sensors can help instruments manufactures, platform operators and scientist to validate instruments. This abstracts introduce OBSEA (Expandable Seafloor Observatory, www.obsea.es), a permanent underwater cabled seabed observatory located in front of the Catalan’s coast near Barcelona, at 20 m depth. Further, some of the current activities...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Barbara Davidde Petriaggi, Gabriele Gomez de Ayala
The need of documentation of wide archaeological submerged areas has been a stimulus for the development and implementation of a threedimensional scanning system providing accurate information about the dimensional data and chromatic values of the artefacts. The paper presents the work carried out on the underwater site of the “Villa con ingresso a protiro” in the Baiae Marine Protected Area, Underwater Park (Naples), in the frame of the ISCR “Restoring Underwater” Project, funded by MIBACT. Its extension is more than 10,000 square meters and the site lies at an average depth of 4 meters....
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Luca Panebianco, Silvia Zingaretti, Nicolò Ciuccoli, Corentin Altepe, S. Murat Egi, Fiorenza Micheli, David Scaradozzi
Underwater monitoring and exploration actions are fundamental to preserve natural habitats and submerged cultural heritage, but researchers have to face high costs related to technology and staff to carry out researches in this troublesome environment. As a partial solution to these problems, Citizen Science has been incrementally employed by the scientific community but, to effectively make the most of it, it is mandatory to design two components: a genericscenario procedure that describes the steps to perform before, during and after the survey and tailored technologies to acquire, gather,...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Rachele Napolitano, Massimiliano Guarneri, Maria Cristina Gambi, Enrico Primo Tomasini
The idea underlying this proposal is to understand the exploitability of scanning technologies for studying and observing the shape variability of marine sessile benthic organisms with particular focus on corals. This is a preliminary study in order to compare the different systems, laser-based and photogrammetric techniques, for 3D shape reconstruction and color information. The approach to the study has been schematized by using several solutions, with the aim to investigate performance in terms of operation, process reliability, quality and metric accuracy of 3D models obtained by...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Tina Silovic, Gérald Grégori, Mathilde Dugenne, Melilotus Thyssen, François Calendreau, Thibaut Cossart, Harrie Kools, George Dubelaar, Michel Denis
Heterotrophic microorganisms represent the main consumers and mineralisers of the organic matter in the ocean as well as in inland waters. These organisms are in strong interaction with phytoplankton and higher trophic levels and may react quickly to environmental changes. In contrast with phytoplankton, due to the lack of photosynthetic pigments they do not naturally emit fluorescence, which makes more complex their analysis by flow cytometry, and consequently, their dynamics at short time and spatial scales are poorly documented. To fill this gap and extend high frequency observation...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Mark.A. van Dijk, Augusto Passarelli, Fabio Conversano, Raffaella Casotti
A CytoSub (Cytobuoy bv) scanning flow cytometer has been operating for 2 months on a floating buoy at a coastal site in the Gulf of Naples, measuring phytoplankton concentrations every 2 hours. The system was connected to an elastic beacon which provided power and data transmission to the onshore station by wifi. A userinterface was build using R software to automate the data analyses and identify significant cell clusters. Several clusters of autofluorescing phytoplankton were identified, based on different distributions of optical parameters such as scatter and fluorescence. All clusters...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Casotti Raffaella, Balestra Cecilia, Van Dijk Mark, Passarelli Augusto, Sigrist Jürg, Hammes Frederik
Marine microbes are ubiquitous and play a fundamental role in shaping the oceans as we know them, through key processes such as photosynthesis and biogeochemical cycles. Their monitoring requires sampling at the correct time and space, since they show high turnover rates and patchy distributions. We have used two on-line flow cytometry systems to monitor marine microbes in the coastal area of the Gulf of Naples, as a proof-of-concept that this technology can represent a useful tool for real-time alert systems of water biological quality. Bacterial and picophytoplankton concentrations are...
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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Gianluca Antonelli, Filippo Arrichiello, Andrea Caiti, Giuseppe Casalino, Giovanni Indiveri, Lorenzo Pollini, Enrico Simetti
The paper presents the recent and ongoing activities of the Italian Center named ISME on the use of Autonomous Surface Crafts (ASCs) and Autonomous Underwater Vehicles (AUVs) for geoseismic survey. In particular, the paper will focus on the technologies and the algorithms developed in the framework of the H2020 European Project WiMUST.
1st IMEKO TC19 Workshop on Metrology for the Sea
· TC19
· 2017
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