Browsing by Author "Maguer, Alain"
Now showing items 1-15 of 15
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A classification technique combining aspect dependence and elastic properties of target scattering
Zerr, Benoit; Tesei, Alessandra; Maguer, Alain; Fox, Warren L. J.; Fawcett, John A. (NATO. SACLANTCEN, 1999/04)Discrimination between man-made and natural underwater objects and between man-made objects of different characteristics are the key objectives of target classication. The current approach is mainly based on the analysis ... -
A parametric synthetic aperure sonar for detection of proud and buried mines
Fioravanti, Stefano; Maguer, Alain; Lovik, A. (NATO. SACLANTCEN, 1997/12)This paper describes an experimental comparison between a parametric sonar and a conventional sonar for the detection of small objects on and in, the sea bed. Two experiments were performed in France (GESMA site) in October ... -
Detection of buried objects at low grazing angles: preliminary experimental results
Fox, Warren L. J.; Maguer, Alain (NATO. SACLANTCEN, 1998/06)This report considers the acoustic detection of objects buried in the seabed, and especially the possibility of using subcritical insonification geometries in order to increase coverage rate. -
Generic Oceanographic Array Technologies (GOATS)'98: bi-static seabed scattering measurements using autonomous underwater vehicles
Schmidt, Henrik; Maguer, Alain; Bovio, Edoardo; Fox, Warren L. J.; LePage, Kevin D.; Pace, Nicholas G.; Hollett, Reginald D.; Guerrini, Piero; Sletner, Per Arne; Michelozzi, Enzo; Moran, B.; Grieve, R. (NATO. SACLANTCEN, 1998/10)The GOATS'98 experiment was performed May 5-29, 1998 in shallow water off Marciana Marina, on the island of Elba, Italy. The experiment addressed some of the fundamental issues associated with using the new Autonomous Ocean ... -
Localization of small surface vessels through acoustic data fusion of two tetrahedral arrays of hydrophones
Tesei, Alessandra; Fioravanti, Stefano; Grandi, Vittorio; Guerrini, Piero; Maguer, Alain (CMRE, 2014/01)Detection and tracking of vessels is important in confined areas such as marine parks or harbors. Nowadays, the presence of ships can be accurately monitored either by radar or via AIS system, while small vessels, which ... -
Measurements of acoustic scattering from partially and completely buried spherical shells
Tesei, Alessandra; Maguer, Alain; Fox, Warren L. J.; Schmidt, Henrik (NATO. SACLANTCEN, 1999/04)Recent work at NATO SACLANT Undersea Research Centre has concentrated on investigating the use of low frequency sonars (2-20 kHz) in order to better exploit scattering features of buried targets that can contribute to their ... -
Mechanisms for subcritical penetration into a sandy bottom: experimental and modelling results
Maguer, Alain; Bovio, Edoardo; Fox, Warren L. J.; Pouliquen, Eric; Schmidt, Henrik (NATO. SACLANTCEN, 1998/05)This paper presents the results of a recent study whose overall objectives are to determine the mechanism(s) contributing to subcritical acoustic penetration into ocean sediments, and to quantify the results for use in ... -
Modelling of scattering by objects on the seabed
Fawcett, John A.; Fox, Warren L. J.; Maguer, Alain (NATO. SACLANTCEN, 1997/12)This paper describes some of the theory and implementation issues of modeling the backscattered -
Passive acoustic surveillance of surface vessels using tridimensional array on an underwater glider
Tesei, Alessandra; Been, Robert; Cardeira, Bruno; Galletti, Domenico; Cecchi, Daniele; Garau, Bartolome; Maguer, Alain; Williams, David P. (CMRE, 2019/06)The NATO-STO Centre for Maritime Research and Experimentation (CMRE) has proposed to approach the problem of monitoring marine traffic in defined sea areas by using passive acoustics on a mobile underwater platform, in ... -
Receiving and transmitting acoustic systems for AUV/gliders
Maguer, Alain; Dymond, Rodney; Guerrini, Piero; Troiano, Luigi; Grandi, Vittorio; Figoli, Alberto; Olivero, Claudio; Sapienza, Alessandro; Fioravanti, Stefano; Potter, John Robert (NURC, 2009/12)NURC in the past years have focused its research on the use of AUV and more recently on gliders and is now developing littoral autonomous sensing networks based onthose sensors to perform missions such as mine warfare, ... -
Recent technological advances in underwater autonomy
Maguer, Alain; Been, Robert; Tesei, Alessandra; Alves, João; Grandi, Vittorio; Biagini, Stefano (2019/05)Underwater Unmanned systems (or more precisely systems of systems) will definitely play an important role in future maritime surveillance and environmental data collection. For many years, the NATO Centre for Maritime ... -
Resonance analysis of the acoustic response of a water-filled cylindrical shell
Tesei, Alessandra; Fawcett, John A.; Fox, Warren L. J.; Maguer, Alain (NATO. SACLANTCEN, 1998/09)The resonance analysis approach developed for characterizing free-field air-filled cylindrical shells in terms of geometrical and mechanical pararneters is extended to fluid-filled shells either in the freefield or proud ... -
Resonance scattering analysis by autoregressive models applied to air-filled, cylindrical, thin walled shells in water
Tesei, Alessandra; Fox, Warren L. J.; Maguer, Alain; Lovik, A. (NATO. SACLANTCEN, 1997/10)Autoregressive (AR) parametric spectral estimation of the scatterer transfer function is applied to the analysis of acoustic scattering by elastic objects. In accordance with Resonance Scattering Theory (RST), the specular ... -
Sub-bands beam-space adaptive beamformer for port-starboard rejection in triplet sonar arrays
Stinco, Pietro; Tesei, Alessandra; Maguer, Alain; Ferraioli, Fabrizio; Latini, Valerio; Pesa, Luca (CMRE, 2019/05)This paper addresses the problem of Port-Starboard (PS) beamforming for low-frequency active sonar (LFAS) with a triplet receiver array. The paper presents a new algorithm for sub-bands beam-space adaptive beamforming with ... -
The application of parametric side scan sonar to the detection of proud and buried targets
Bovio, Edoardo; Maguer, Alain; Fioravanti, Stefano (NATO. SACLANTCEN, 1998/01)This paper describes an experiment designed to evaluate the feasibility of using the TOPAS parametric transmitter mounted in side scan mode, for the detection of buried targets. The concept was tested with proud targets ...