Development and Validation of Robust Satellite Techniques (RST) for Oil Spill Detection and Monitoring

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Chapter one Introduction Chapter one Introduction In last years, the environmental pollution of the sea due to oil spills, revising from different sources (oil rigs releases, illegal discharges from vessels, tanker accidents, acts of environmental warfare, etc.) still continue to be a serious environmental problem. Satellite remote sensing could be an useful tool in term of management of the risks due to oil spills and for a control and near-real time (NRT) monitoring. Many techniques exist, mainly based on the use of SAR (Synthetic Aperture Radar) sensors. SAR technology, in fact, offer several advantages (namely when weather and light conditions are unfavourable) and has been proven to be a useful tool for ocean oil spill detection. Unfortunately, such methods (besides problems which still exist in recognizing oil spill in various wind condition) can be profitably used for real-time or near real- time detection only in the polar regions. In fact, due to the variation of satellite orbit track spacing with latitude, density of observations and revisit rate strongly degrade moving from high latitudes to the equatorial zones (e.g. the revisit time for RADARSAT is about 6 and 35 days for polar and equatorial zones, respectively). Till SAR constellations (like the Italian 1 COSMO-Skymed mission and the canadian RADARSAT constellation), able to increase time repetition, will not be operative, the SAR technology cannot be used for a near real-time monitoring of these phenomena. 1 COnstellation of Small Satellites for the Mediterranean basin Observation 1

Anteprima della Tesi di Daniele Casciello

Anteprima della tesi: Development and Validation of Robust Satellite Techniques (RST) for Oil Spill Detection and Monitoring, Pagina 1

Tesi di Dottorato

Dipartimento: Dipartimento di Ingegneria e Fisica dell'ambiente

Autore: Daniele Casciello Contatta »

Composta da 154 pagine.

 

Questa tesi ha raggiunto 267 click dal 23/09/2008.

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