SOURCE LOCALIZATION USING A REFERENCE WAVE TO CORRECT FOR OCEANIC VARIABILITY

This Paper describes a low-frequency, long-range acoustic Propagation method for source localization. It is based on imaging techniques that remove the effects of adiabatic oceanic variability between an acoUStic receiving array and an Unknown source by combining measured data from the unknown source with measured data from a known reference source. At the heart of the concept is the realization that both sets of measured data are contaminated in the same way by the range-integrated effects of the ocean, for the stretch of ocean that they share between their positions and the receiving array. These contaminants can be made to cancel, leaving the integrated, and much smaller, effects of the oceanic variability between the reference source and the unknown source.