Anselme Muzirafuti, Antonio Crupi, Stefania Lanza, Giovanni Barreca, Giovanni Randazzo
Mapping coastal areas and shallow water depth has become an interesting topic for hydrographers and scientists. Many techniques using traditional methods have been used to map and study seabed evolutions of these areas. However, ships, vessels and aircrafts used for bathymetric surveys in shallow water present some limitations, especially their inability to map hard-to-reach areas and very near shoreline waters. In addition, the cost and human resources deployed to conduct these surveys make them very expensive, even for small projects. In this paper we present a cost-effective tool and a...
Lorenzo Rossi, Irene Mammi, Filippo Pelliccia
Bathymetric data are commonly used for coastal erosion monitoring and engineering projects. Multispectral satellite imagery is nowadays commonly applied to derive bathymetry with different literature algorithms. The present study shows the results of a Unmanned Aerial Vehicle (UAV), also known as drone, derived bathymetry (UDB) equipped with a multispectral camera acquiring in the same WorldView-2 sensors spectral bands. An hydrographic Multibeam Echosounder (MbEs) survey was performed in the same period in order to validate the method accuracy. The study area is approximately 0.5 km2 and...
Wehde H., Thomsen L., Pfannkuche O., Albiez J., Flogel S., Godo O.R., Torkelsen T., Valencia J., Rodriguez E., Lopez V., Marini S., Grimsbo E., Zhang G., Aguzzi J.
This paper presents the ecology and policy basis as well as the technology solution for a Martera funded project (ARIM). The project develops platforms for bentho-pelagic monitoring using an arrangement of crawler and stationary platforms. A combination of visual and acoustic sensing along with standard oceanographic sensors supports advanced and continues spatial-temporal monitoring. Just as important is the automatic processing techniques under development that will allow habitat and species (or categories of species) to be automatically recognized and reported during the mission and thus...
Nikolla Gjeci, Shashank Govindaraj, Sander Coene, Alexandru But, Ennio Ottaviani
Autonomous underwater mapping operations are limited by onboard energy constraints in AUVs. The ENDURUNS project proposes to use fuel cells technologies to provide extended duration of AUV mapping operations. This type of mission generates large quantities of multi-beam sonar data available onboard at remote maritime locations. Satellite links can provide connectivity from remote control centers to these unmanned assets, but have limited bandwidth to transfer unprocessed data. This paper describes onboard semantic classification of raw sensor data using deep learning for a compressed...
Emanuela Fanelli, Jacopo Aguzzi, Raffaella Casotti, Fabio Conversano, Domenico D Alelio, Daniele Iudicone, Simone Marini, Sergio Stefanni
Here we present the concept of NEREA, the Naples Ecological REsearch for Augmented observatories, an integrated observatory with a modular, adaptive structure, characterised by two main modules, NEREA-mob and NEREA-fix. NEREA-mob is conceived as monthly sampling at a coastal station in the Gulf of Naples where the whole water column is sampled for end-to-end (from microbes to fish) biological parameters coupling traditional with omic approaches (metagenomics, metatranscriptomics and metabolomics). NEREA-fix will be deployed in 2020 in the Dohrn canyon at ca. 600 m, and will integrate a...
Nixon Bahamon, Jacopo Aguzzi, Miguel Ángel Ahumada-Sempoal, Joan Baptista Company, Charlotte Reuschel, Francesc Peters, Raffaele Bernardello, Joan Navarro, Zoila Velásquez, Antonio Cruzado
Average global land and ocean surface temperature has stepped up since 2014 above the average. The Mediterranean Sea temperature follows this global trend. The effects of the warming on coastal areas in the Mediterranean are worrying, as they are biodiversity hotspots. Atypical warmer summer periods in the Mediterranean have been pointed out as potential drivers of massive mortalities of deep-sea organisms. Multi-sensor mooring arrays are fundamental to assess the magnitude and effects of water warming. Analysis of long-term oceanographic and biogeochemical data collected in two fixed...
Matteo Cutugno, Umberto Robustelli, Giovanni Pugliano
Software Defined Receivers(SDR) can be a very useful tools both for researchers and surveyors since it is capable of extreme customization allowing user to access, visualize and modify signal processing blocks. In this paper we test the single point performance of the GNSS-SDR software receiver coupled with Nuand BladeRF x40 front-end feeded by an active u-blox GNSS antenna powered by a bias-tee needful to provide external gain. Four different tests have been carried out in two different scenarios located in Naples (Italy) employing two different antennas: the first dataset was acquired in a...
Salvatore Gaglione, Silvia Pennino, Vincenzo Piscopo, Antonio Scamardella
The aim of the work is to describe a practical and functional method to transform a wave energy spectrum from encounter frequency domain to absolute frequency domain. An important topic in the marine engineering field is the evaluation of the directional wave spectrum from the ship’s measured motions, however, when a ship advances in a seaway any spectrum estimation is directly in to the encounter frequency domain. A transformation from the encounter domain to the absolute domain, corresponding to observations from a fixed point in the inertial system, is necessary. Several cases have been...
Anna Innac, Antonio Angrisano, Salvatore Gaglione, Nicola Crocetto
Marine geodesy, offshore surveys and physical oceanography are usually related to the highly precise kinematic positioning of surveying platforms such as vessels, buoys and aircrafts. Currently, the Global Navigation Satellite Systems (GNSS) can provide a kinematic positioning accuracy of decimeter to centimeter level in relative mode, being potentially an appropriate choice for determining marine platform positions. However, these positioning techniques are related to the presence of reference stations and are not applicable in remote areas. In this work, two approaches are considered to...
Giovanni Battista Rossi, Francesco Crenna, Vincenzo Piscopo, Antonio Scamardella
The monitoring of sea waves, either for weather forecasting or for comfort evaluation in navigation, typically includes spectrum measurement of wave elevation, either as the final result or as an intermediate step for the measurement of the relevant wave-motion parameters. Therefore, different spectrum estimation methods have been compared, by applying them to simulated wave-motion signals. Their performance is reported and guidelines for their application are provided.