Abstract
The performance of an intersensor processing algorithm which seeks to localize a moving vessel radiating a narrow‐band acoustic signal is dependent upon the placement of the sensors relative to the source, as well as on the cross‐correlation algorithm and its processing parameters. Since the localization uncertainty is dependent upon the accuracy of the measurements of intersensor differential time of arrival, the processing bandwidth and coherent integration time of the correlator must be chosen in such a way as to maximize the output signal to noise ratio, while simultaneously avoiding decorrelation effects caused by source‐sensor motion and nonidentical ocean transfer function (multipath) effects. In this paper we will demonstrate how a‐priori estimates of the acoustic source spectrum, the source kinematics, and the propagation characteristics of the ocean medium were used to specify a reasonable deployment geometry for a set of distributed sensors and an effective set of correlation processing parameters for the over‐the‐horizon localization of a towed projector. [Work supported by NADC.]
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