A Wavelet Technique to Extract the Backscatter Signatures from SAR Images of the Sea (Contributo in atti di convegno)

Type
Label
  • A Wavelet Technique to Extract the Backscatter Signatures from SAR Images of the Sea (Contributo in atti di convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.2529/PIERS090218071008 (literal)
Alternative label
  • Zecchetto S.; De Biasio F.; Trivero P. (2009)
    A Wavelet Technique to Extract the Backscatter Signatures from SAR Images of the Sea
    in Progress in Electromagnetics Research Symposium (PIERS 2009 Moscow), Moscow, RUSSIA, AUG 12-21, 2009
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Zecchetto S.; De Biasio F.; Trivero P. (literal)
Pagina inizio
  • 266 (literal)
Pagina fine
  • 270 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • PIERS 2009 MOSCOW VOLS I AND II, PROCEEDINGS (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1,2 : Istituto Scienze dell'Atmosfera e del Clima, Italy 3 : Universita' di Alessandria, Italy (literal)
Titolo
  • A Wavelet Technique to Extract the Backscatter Signatures from SAR Images of the Sea (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-1-934142-10-3 (literal)
Abstract
  • SAR images of the sea often show backscatter patterns linked to the horizontal structure of the Marine Atmospheric Boundary Layer (MABL) at the interface with the sea surface. In general, their dimensions are spread over a wide range of length scales, presenting spatial periodicity as well as intermittence. With the aim to isolate such backscatter structures, the two-dimensional Continuous Wavelet Transform (CWT2) analysis has been applied to SAR, images of the sea. The CWT2 analysis permits to highlight the backscatter cells associated to the structure of MABL, as well as to evidence the structure of the atmospheric gravity waves occurring at the lee side of islands and coast. The cells detected in the range 0.3 km divided by 4 km are directly associated to the wind spatial structure deriving, in turns, from the turbulent characteristics of the wind flow. They have an elliptic shape, with the major axis along the (aliased) wind direction. Those with size falling inside the spatial range 4 km divided by 20 km describe, instead, the atmospheric gravity waves structure (if present) and the structures linked to the wind shading. The technique developed is the background for several applications: it has been used to compute the wind fields without any a priori information, as well as to study the inner structure of the Langmuir atmospheric circulation. Other applications could be on the detection of sea surface oil slicks. (literal)
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