Boccia, Valentina (2015) Bathymetric digital elevation model generation from L-band and X-band synthetic aperture radar images in the Gulf of Naples, Italy: innovative techniques and experimental results. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Bathymetric digital elevation model generation from L-band and X-band synthetic aperture radar images in the Gulf of Naples, Italy: innovative techniques and experimental results |
| Autori: | Autore Email Boccia, Valentina valentina.boccia@unina.it |
| Data: | 18 Marzo 2015 |
| Numero di pagine: | 153 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Ingegneria Industriale |
| Scuola di dottorato: | Ingegneria industriale |
| Dottorato: | Ingegneria aerospaziale, navale e della qualità |
| Ciclo di dottorato: | 27 |
| Coordinatore del Corso di dottorato: | nome email de Luca, Luigi deluca@unina.it |
| Tutor: | nome email Moccia, Antonio [non definito] Vetrella, Sergio [non definito] Renga, Alfredo [non definito] |
| Data: | 18 Marzo 2015 |
| Numero di pagine: | 153 |
| Parole chiave: | SAR; Synthetic Aperture Radar; bathymetry; swell waves |
| Settori scientifico-disciplinari del MIUR: | Area 09 - Ingegneria industriale e dell'informazione > ING-IND/05 - Impianti e sistemi aerospaziali |
| Depositato il: | 09 Apr 2015 10:46 |
| Ultima modifica: | 25 Set 2015 07:27 |
| URI: | http://www.fedoa.unina.it/id/eprint/10082 |
| DOI: | 10.6092/UNINA/FEDOA/10082 |
Abstract
The present Ph.D. Thesis investigates remote sensing bathymetric techniques in coastal area based on the use of Synthetic Aperture Radar (SAR) data. Since SAR signal is not able to pass sea surface and to reach sea bottom, indirect processes with sea floor morphology sensed through the effects it may have on sea surface are investigated. The conventional bathymetric techniques are briefly analyzed and the main advantages related to the use of remote sensing SAR-based bathymetric techniques highlighted. Proper sea surface modeling is performed and its interaction with SAR is investigated. Two different bathymetric techniques are proposed: the Wave-Based Approach (WBA) and the Current-Based Approach (CBA). Several theories for proper modeling of the involved phenomena and of their retrieval from SAR images are presented and the most promising are identified. An error budget analysis is performed and potential performance, specifications and requirements of the considered bathymetric approaches are described. With specific reference to the area of the Gulf of Naples, Italy, the Wave-Based Approach is selected because of current velocity being too slow or too irregular both in time and in intensity for proper application of the Current-Based Approach. Therefore, a WBA algorithm for sea surface spectrum retrieval from SAR data is proposed. The proposed WBA algorithm is applied on both L-band ALOS PALSAR images and X-band COSMO-SkyMed SAR images covering the area of the Gulf of Naples, Italy. The experimental results and the achieved improvements with respect to the approaches found in the available literature are presented. Digital Elevation Models (DEMs) of seabed are obtained and a correlation analysis with the retrieved water depth values from the official nautical charts provided by the Italian Navy Hydrographic Institute is performed.
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