Range-dependent waveguide scattering model calibrated for bottom reverberation in a continental shelf environment

• DOI: 10.1121/1.2832509
• Publication Date: 2008-03-11T22:53:20Z
• Authors: Ameya Galinde; Ninos Donabed; Mark Andrews; Sunwoong Lee; Nicholas C. Makris; Purnima Ratilal
• Keywords: Waveguide

An analytic model is developed for scattering from random inhomogeneities in range-dependent ocean waveguides using the Rayleigh–Born approximation to Green’s theorem. The expected scattered intensity depends on statistical moments of fractional changes compressibility and density, which scatter as monopoles dipoles, respectively, coherence volume inhomogeneities. calibrated bottom data acquired by instantaneous wide-area acoustic waveguide remote sensing (OAWRS) geophysical surveys ONR Geoclutter Program. strength seafloor New Jersey shelf, a typical continental shelf environment, found depend wave number k, medium Vc, seabed depth penetration factor Fp following 10log10(FpVck4) dependence. A computationally efficient numerical approach rapidly compute reverberation over wide areas parabolic equation exploiting correlation between monopole dipole terms introducing factors. also distinguishing moving clutter statistically stationary background tracking temporal spatial fluctuations OAWRS images.