Inversion of Normal Incidence Backscattered Data: Getting Seabed Geoacoustic and Morphological Parameters

Caiti, Andrea; Bergem, O.

doi:10.1007/978-94-011-4112-3_11

Cited by 1 publication

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of wavelet transforms for the analysis of backscattered data has been proposed by Bishop et al [23,24] and by McLeod and Tufts [25]. An experimental verification of the potential of the approach has been reported by Caiti et al [20]. Let x(t) be a generic bounded signal and consider the following transform:…”

Section: The Estimation Algorithmmentioning

confidence: 99%

“…The approach relies on the use of a parametric sonar as the sound source; on a model of seafloor backscattering based on the Kirchhoff approximation for the surface scattering and on the small perturbation theory for the volume scattering; and on a model-based estimation method in which the discrepancy between measured data and the model prediction is evaluated in a generalized time-frequency domain and minimized as a function of the bottom parameters. Partial results from this line of work have been reported in [20][21][22] (for model-based estimation) and [15,16] (for modelling of backscattering). In this paper a comprehensive account of the method is given, the interplay between the three system components is emphasized and the overall range of validity of the approach is discussed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Parametric sonars for seafloor characterization

Caiti

Bergem

Dybedal³

1999

Meas. Sci. Technol.

View full text Add to dashboard Cite

Parametric sonars are instruments capable of transmitting acoustic signals in the water with a very narrow beam and almost no sidelobes. These features are exploited in this paper to define a methodology for quantitative estimation of the geo-acoustic and morphological properties of the uppermost seafloor sediment layer. The three major components of the approach are the parametric instrument itself; the modelling of the forward-propagation problem, with the use of the Kirchhoff approximation for surface scattering and of the small-perturbation theory for the volume scattering; and the definition of a criterion for comparison between data and model predictions, which is accomplished by a generalized time-frequency analysis. In this way the estimation becomes one of a model-based identification, or a model-based inverse problem. Results from a field trial in a shallow water area of the Mediterranean are shown, and compared with independently gathered ground truth.

show abstract

Section: The Estimation Algorithmmentioning

confidence: 99%