Kd. Heaney et Wa. Kuperman, VERY LONG-RANGE SOURCE LOCALIZATION WITH A SMALL VERTICAL ARRAY, The Journal of the Acoustical Society of America, 104(4), 1998, pp. 2149-2159
Several processors are developed and used to perform source localizati
on on the 3250-km San Diego-Hawaii path of the Acoustic Engineering Te
st (AET). Associated simulations an done to test the range-frequency l
imits of coherent matched-field processing using PE modeling through a
simulated internal-wave environment. The AET experiment is presently
well beyond the range of effective coherent matched-held processing. A
mode filter was developed to extract 60 complex made amplitudes from
the data received on the 20-element vertical line array. A mode space
depth estimator successfully localizes the source. A mode arrival time
difference range estimator is developed and found to be biased by int
ernal-wave induced mode coupling. The final processor developed utiliz
es the stability of early arriving wavefronts to determine the source
range by matching wavefront arrival patterns. (C) 1998 Acoustical Soci
ety of America. [S0001-4966(98)05809-3]