Model-based ocean acoustic passive localization

Conference · Mon Jan 24 04:00:00 EST 1994

OSTI ID:10142429

Candy, J V ^[1]; Sullivan, E J ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Naval Undersea Warfare Center, Newport, RI (United States)

The detection, localization and classification of acoustic sources (targets) in a hostile ocean environment is a difficult problem -- especially in light of the improved design of modern submarines and the continual improvement in quieting technology. Further the advent of more and more diesel-powered vessels makes the detection problem even more formidable than ever before. It has recently been recognized that the incorporation of a mathematical model that accurately represents the phenomenology under investigation can vastly improve the performance of any processor, assuming, of course, that the model is accurate. Therefore, it is necessary to incorporate more knowledge about the ocean environment into detection and localization algorithms in order to enhance the overall signal-to-noise ratios and improve performance. An alternative methodology to matched-field/matched-mode processing is the so-called model-based processor which is based on a state-space representation of the normal-mode propagation model. If state-space solutions can be accomplished, then many of the current ocean acoustic processing problems can be analyzed and solved using this framework to analyze performance results based on firm statistical and system theoretic grounds. The model-based approach, is (simply) ``incorporating mathematical models of both physical phenomenology and the measurement processes including noise into the processor to extract the desired information.`` In this application, we seek techniques to incorporate the: (1) ocean acoustic propagation model; (2) sensor array measurement model; and (3) noise models (ambient, shipping, surface and measurement) into a processor to solve the associated localization/detection problems.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10142429
• Report Number(s): UCRL-JC--116176; CONF-9409102--1; ON: DE94009510; CNN: Contract N00014-91-F-0114
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450000
ACOUSTIC MEASUREMENTS
ACOUSTICS
DETECTION
FACILITIES, EQUIPMENT, AND TECHNIQUES
MATHEMATICAL MODELS
MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
SUBMARINES
WAVE PROPAGATION