Towed array geometry estimation during ship’s maneuvering

Adaptive Beamforming of a Towed Array During a Turn

During maneuvering, towed array beamforming degrades if a straight array is assumed. This is especially true for high-resolution adaptive beamforming. It is experimentally demonstrated that adaptive beamforming is feasible on a turning array, provided that array shape is estimated. The array shape can be inferred solely from the coordinates of the tow vessel’s Global Positioning System (GPS) wi...

Towed array shape estimation using Kalman filters-theoretical models - Oceanic Engineering, IEEE Journal of

The dynamical behavior of a thin flexible array array motion, becomes more critical. Typical of the more towed through the water is described by the Paidoussis equation. sophisticated towed array processing techniques are adaptive By discretizing this equation in space and time a finite dimenbeamforming [31, adaptive cancellation of tow vessel noise sional state space representation is obtained...

Statistical estimation of transmission loss from geoacoustic inversion using a towed array.

Geoacoustic inversion estimates environmental parameters from measured acoustic fields (e.g., received on a towed array). The inversion results have some uncertainty due to noise in the data and modeling errors. Based on the posterior probability density of environmental parameters obtained from inversion, a statistical estimation of transmission loss (TL) can be performed and a credibility lev...

Position Estimation of a Towed Underwater Body

Spatial Spectrum Estimation with a Maneuvering Sensor Array in a Dynamic Environment

Spatial Spectrum Estimation with a Maneuvering Sensor Array in a Dynamic Environment by Jonathan L. Odom Department of Electrical and Computer Engineering Duke University