Localization of acoustic transients in shallow water environments

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Authors
Nicholson, Charles Louis
Subjects
Localization
ASW
Shallow water
Transients
Advisors
Miller, James H.
Chiu, Ching-Sang
Date of Issue
1992-12
Date
December 1992
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
Determination of an underwater target's position using passive acoustic sensors is of considerable use for the Navy, both for Anti-submarine warfare (ASW) and underwater surveillance. This thesis proposes and develops localization algorithms capable of passively determining the location of a transient source given some broad constraints. In particular, this thesis investigates the effect of the source signal uncertainty on localizer performance. The localization process consists of two parts. First, a time domain propagation modeling code determines the impulse response of the environment from all possible source location to a single hydrophone. This program predicts the signal as it would appear at the receiver from a grid of possible source locations. Second, source localization results from finding the maximum correlation between the positionally dependent, numerical modeled signals and the actual received signal. The position of the maximum cross correlations reveals an estimate of source position. Using model to model correlation, this techniques successfully localized acoustic sources in both Monterey Bay and Barents Sea scenarios.
Type
Thesis
Description
Series/Report No
Department
Department of Electrical and Computer Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
32 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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