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Titolo:
Matched-field source tracking by ambiguity surface averaging
Autore:
Fialkowski, LT; Perkins, JS; Collins, MD; Nicholas, M; Fawcett, JA; Kuperman, WA;
Indirizzi:
USN, Res Lab, Washington, DC 20375 USA USN Washington DC USA 20375USN, Res Lab, Washington, DC 20375 USA Def Res Estab Atlantic, Dartmouth, NS B2Y 3Z7, Canada Def Res Estab Atlantic Dartmouth NS Canada B2Y 3Z7 th, NS B2Y 3Z7, Canada Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, San Diego, CA92152 USA Univ Calif San Diego San Diego CA USA 92152 s Lab, San Diego, CA92152 USA
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 2, volume: 110, anno: 2001,
pagine: 739 - 746
SICI:
0001-4966(200108)110:2<739:MSTBAS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHALLOW-WATER; SOURCE LOCALIZATION; VERTICAL ARRAY; MOVING SOURCE; WAVE-GUIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Fialkowski, LT USN, Res Lab, Washington, DC 20375 USA USN Washington DC USA 20375 Lab, Washington, DC 20375 USA
Citazione:
L.T. Fialkowski et al., "Matched-field source tracking by ambiguity surface averaging", J ACOUST SO, 110(2), 2001, pp. 739-746

Abstract

The method of matched-field source tracking by ambiguity surface averagingis demonstrated using low-frequency shallow-water acoustic data recorded on a vertical array. In this method, source motion is taken into account by averaging values from individual, short time-average matched-field ambiguity functions; each resulting average value corresponds to a trial source track. The result is a new ambiguity function which depends on six parameters:the three-dimensional coordinates of the initial and final source positions. A simplification to four parameters is made by assuming the source remains at a constant depth. Only mild restrictions are made on trial tracks considered, and the resulting ambiguity surfaces can be plotted as a function of final coordinates by holding the initial coordinates fixed at the optimal position. When applied to experimental data, the number of high sidelobespresent in individual matched-field ambiguity surfaces is greatly reduced. Also, the technique appears robust to uncertainties in replica computation(due to various mismatch problems) and periods when the signal-to-noise ratio is low. (C) 2001 Acoustical Society of America.

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Documento generato il 26/09/20 alle ore 13:33:11