Browsing Technical Reports by Author "Tesei, Alessandra"
Now showing items 1-6 of 6
-
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 ... -
Application of aided inertial navigation system to synthetic aperture sonar micronavigation
Tesei, Alessandra; Pinto, Marc A. (NATO. SACLANTCEN, 2001/01)In order to improve short-term navigational accuracy, critical to successful SAS processing, a highquality Inertial Navigation System (INS) is investigated, which consists of an inertial measurement unit (IMU) and a strapdown ... -
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 ... -
Real-and synthetic-array signal processing of buried targets
Pinto, Marc A.; Bellettini, Andrea; Hollett, Reginald D.; Tesei, Alessandra (NATO. SACLANTCEN, 2002/01)Results from two field experiments aimed at investigating the detection and classification of buried targets are presented. In both experiments a 2-16 kHz parametric source was used. In the first experiment the source was ... -
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 ...