Accession Number:

ADA196547

Title:

Passive Localization: A Model-Base Approach

Descriptive Note:

Corporate Author:

SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s):

Report Date:

1988-05-01

Pagination or Media Count:

45.0

Abstract:

Passive localization by use of acoustic propagation models, sometimes called Matched Field Processing is usually carried out in three steps. First some appropriate model is selected, then model parameters usually taken from archival data or from auxiliary measurements are introduced into the model. Finally acoustic measurements of the field radiated by the source to be located are made - which, in combination with the properly parametrized model, allow a solution for the source coordinates to be carried out. Here we use such a model- based approach in conjunction with a normal-mode model. By coupling the procedure with a parameter estimationidentification scheme and using a horizontal towed array instead of the usual vertical array, we show that the model parameters need not be known a priori in order to carry out the solution. This is in contrast to the standard approach in which the modal functions and wavenumber must be a priori known in order to solve the problem sufficient information to determine the range of the source can be inferred directly from the measured data themselves. Using a sophisticated acoustic propagation model to generate simulated data, coupled with various array signal processing techniques, the feasibility of the approach is demonstrated.

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE