title: Spectral integral representations of volume scattering in sediments in layered waveguides.
abstract: In situ measurements of scattering strength are often obtained by analyzing the early-time, high-angle reverberation from bottom and subbottom features. In order to provide insight into the mechanisms which cause bottom reverberation, and to their distinguishing characteristics, it is necessary to have a capability for modeling both the rough surface and the volume scattering mechanisms. For high-angle, early-time backscatter, the most appropriate approach is to use a spectral integral representation, which naturally includes the continuous spectrum important for this angular regime. A rough surface scattering theory developed earlier in this framework has provided important insights into wave scattering and penetration physics at the seafloor. Here a consistent representation for the subbottom scattering is developed and examples are provided which illustrate the observable differences between the two scattering mechanisms.
authors.affiliation: SACLANT Undersea Research Centre, La Spezia, Italy.
authors.forename: K D
authors.initials: KD
authors.lastname: LePage
authors.forename: H
authors.initials: H
authors.lastname: Schmidt
mesh_terms: D005583:Fourier Analysis; D006801:Humans; D009791:Oceanography; D012542:Scattering, Radiation; D013016:Sound; D013018:Sound Spectrography