Abstract
A broadband ray model is used to simulate data from a deep water experiment (TAGEX 87) in which a pseudo random noise (PRN) source is towed past a 24‐element, bottom‐moored array. The source spectrum contains a series of evenly spaced lines from 60–100 Hz. Simulated shade plots of received spectrum level versus frequency and time exhibit excellent agreement with the data. A broadband matched field algorithm is used to localize the source in range as a function of time. The algorithm consists of matching the recorded cross spectrum R1R2* between two phones with simulated cross spectra S1S2* at a series of ranges. The correlations between recorded and simulated cross spectra are added coherently as a function of frequency to obtain the localization matrix entry: Lij = Σf[RliR2i*] [SljS2j*]*. Successful localizations of the PRN source are obtained at ranges from 0–30 km. [Work supported by Naval Ocean Systems Center, Code 733, under contract N00039‐88‐C‐0043‐1‐43.]
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