Browsing CMRE Publications by Title

Now showing items 180-199 of 882

    • AUV technology for shallow water MCM reconnaissance 

      Evans, Benjamin; Baralli, Francesco; Bellettini, Andrea; Bovio, Edoardo; Coiras, Enrique; Davies, Gary L.; Groen, Johannes; Myers, Vincent; Pinto, Marc A. (NURC, 2007/10)
      The ability to perform MCM reconnaissance missions in shallow water is important in both expeditionary MCM and in the protection of ports against maritime improvised explosive devices (MIEDs). For many years AUV systems ...

    • AUV-enabled adaptive underwater surveying for optimal data collection 

      Williams, David P. (NURC, 2012/04)
      A new adaptive strategy for performing data collection with a sonar-equipped autonomous underwater vehicle (AUV) is proposed. The approach is general in the sense that it is applicable to a wide range of underwater tasks ...

    • Bandwidth efficient concurrent localisation and communication in underwater acoustic networks 

      Sliwka, Jan; Munafò, Andrea; Petroccia, Roberto (CMRE, 2019/05)
      Localisation is essential for an Autonomous Underwater Vehicle (AUV) to perform its mission and to georeference any data acquired during the dive. When the AUV is part of a heterogeneous underwater acoustic network (UAN), ...

    • Bathymetric imaging with wideband interferometric synthetic aperture sonar 

      Pinto, Marc A.; Hollett, Reginald D.; Bellettini, Andrea (NATO. SACLANTCEN, 2001/11)
      A new approach to interferometric sonar is presented, based on time delay estimation using shortterm correlation of the seafloor backscatter. It is most suited to signals with large relative bandwidths and long interferometric ...

    • Bathymetry, gravity and magnetism in the Strait of Sicily 

      Morelli, Carlo (NATO. SACLANTCEN, 1972/09)
      In cooperation with SACLANTCEN, O.G.S. started in 1961 the geophysical survey of the Mediterranean Sea (Allan, Morelli, 1971 ), which after 1966 was continued in the seas around Italy on the oceanographic ships of C.N.R. ...

    • Bayesian inference and sidescan restoration 

      Calder, B. R.; Linnett, L. M. (NATO. SACLANTCEN, 1997)
      We consider a Bayesian approach to the problem of inferring parameters of the SONAR environment given only the gathered sidescan image. A simplified model of the process is developed along with suitable distributions on ...

    • Bayesian multi-class covariance matrix filtering for adaptive environment learning 

      Braca, Paolo; Aubry, Augusto; Millefiori, Leonardo; De Maio, Antonio; Marano, Stefano (CMRE, 2019/05)
      Covariance matrix estimation is a crucial task in adaptive signal processing applied to several surveillance systems, including radar and sonar. In this paper we propose a dynamic environment learning strategy to track ...

    • Bayesian track-to-graph association for maritime traffic monitoring 

      Grasso, Raffaele; Millefiori, Leonardo; Braca, Paolo (CMRE, 2019/05)
      We present a hypothesis test to associate ship track measurements to an edge of a given graph that statistically models common traffic routes in a given area of interest. The association algorithm is based on the hypothesis ...

    • Beam spreading and loss of spatial coherence in an inhomogeneous and fluctuating ocean 

      McCoy, John J. (NATO. SACLANTCEN, 1975/10)
      A theory has been developed that enables estimates to be made of beam bending, beam spreading and loss of spatial coherence. In this paper we concentrate on the loss of spatial coherence due to scattering. Using a minus ...

    • Belief propagation based AIS/radar data fusion for multi-target tracking 

      Gaglione, Domenico; Braca, Paolo; Soldi, Giovanni (CMRE, 2019/05)
      A data fusion technique aiming at combining observations from two classes of sensors is proposed. The first class consists of sensors that produce periodic noisy observations of the targets; moreover, they may also miss ...

    • Benchmark analysis of NURC multistatic tracking capability 

      Gerard, Odile; Coraluppi, Stefano; Carthel, Craig; Grimmett, Douglas (NURC, 2006/08)
      This paper provides a brief description and performance results for the multistatic sonar trackers developed at NURC. Our analysis is based on common data distributed as part of the Multistatic Tracking Working Group ...

    • Benchmark evaluation of multistatic trackers 

      Coraluppi, Stefano; Grimmett, Douglas; Theije, Pascal de (NURC, 2006/08)
      This paper provides an overview of the Special Session on Multistatic Sonar and Radar Tracking at FUSION 2006. This includes background on the Multistatic Tracking Working Group, a brief description of the datasets and ...

    • Benchmarking of SCARAB volume scattering versus OASES volume scattering 

      Bratberg, Ivar; LePage, Kevin D.; Holland, Charles W.; Schmidt, Henrik (NATO. SACLANTCEN, 2001/05)
      OASES uses wavenumber integration to solve for the backscattered pressure caused by sound speed and density inhomogeneity scatterers in the sediment; SCARAB uses a ray path technique to find the backscattered intensity. ...

    • Benchmarking scattering in ocean waveguides 

      Jensen, Finn B.; Ferla, Carlo M.; Gerstoft, Peter (NATO. SACLANTCEN, 1995/07)
      Accurate numerical solutions are presented for benchmark problems

    • Benefit assessment of glider adaptive sampling in the Ligurian Sea 

      Mourre, Baptiste; Alvarez, Alberto (CMRE, 2014/01)
      The benefits of piloting a glider during a 6-day period via an adaptive sampling procedure in a 80 × 60 km2 marine area are assessed under a fully operational framework. The glider trajectory was adapted to reduce the ocean ...

    • Bibliography electromagnetic phenomena with special reference to ELF (1-300 cps) 

      Brock-Nannestad, Lars (NATO. SACLANTCEN, 1964/10)
      Contents: Propagation of EM Waves, Surface Waves, Ionosphere; Calculation of DC and EM Fields, Antennas; Analysis, Measuring Methods, Magnetometers, Correlation; Geomagnetic Fluctuations, Solar Activity, Earth Currents; ...

    • Bispectrum of ship-radiated noise 

      Sullivan, Edward J.; Hinich, M. J.; Marandino, Davide (NATO. SACLANTCEN, 1988/07)
      The bispectrum of ship radiated noise is estimated. The noise was received on a towed array being towed by the same ship that served as the noise source. The array was beamformed such that the forward endfire beam pointed ...

    • Boosting the talent of new generations of marine engineers through robotics competitions in realistic environments: the SAUC-E and euRathlon experience 

      Ferri, Gabriele; Ferreira, Fausto; Djapic, Vladimir (CMRE, 2019/06)
      This article summarizes the experience of the NATO Science and Technology Organization (STO) Centre for Maritime Research and Experimentation (CMRE) in the organization of the Student Autonomous Underwater Vehicle ...

    • Bottom bistatic scattering: experimental results and model comparison for a carbonate sediment 

      Williams, Kevin L.; Jackson, Darrell R. (NATO. SACLANTCEN, 1997)
      Bistatic scattering measurements were carried out under the Coastal Benthic Boundary Layer (CBBL) program. The results presented here are for a carbonate sand-silt-clay, and the data were collected in Februar) 1995 near ...

    • Bottom reflection properties deduced from an ambient noise: simulation of a processing technique 

      Harrison, Chris H.; Baldacci, Alberto (NATO. SACLANTCEN, 2002/11)
      A promising new method has already been proposed [SACLANTCEN SM-387] to calculate bottom reflection loss from ambient noise directionality. Although this method has been tried experimentally at more than 11 sites under ...