| Автор | Andrea Caiti |
| Автор | Oddbjorn Bergem |
| Автор | Johnny Dybedal |
| Дата выпуска | 1999-12-01 |
| dc.description | 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. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Parametric sonars for seafloor characterization |
| Тип | paper |
| DOI | 10.1088/0957-0233/10/12/301 |
| Electronic ISSN | 1361-6501 |
| Print ISSN | 0957-0233 |
| Журнал | Measurement Science and Technology |
| Том | 10 |
| Первая страница | 1105 |
| Последняя страница | 1115 |
| Выпуск | 12 |
