Abstract:

The detection performance of low spectral-level, broadband signals from a submerged acoustic source in the presence of surface interference is described and illustrated with examples obtained in the May 1996 Shallow Water evaluation cell Experiment (SWellEx-96). The experiment was carried out west of Point Loma in 200-m water of complex bathymetry. Adaptive broadband matched-field processing (MFP) was performed on a 240-m aperture horizontal line array. Detection and localization in range, depth, and azimuth is illustrated at all bearings except near the array broadside. The effects of horizontal aperture on MFP robustness and sidelobe levels are also discussed.