Similarities and differences of SAR derived wind fields using two different methods: The local gradient and the continuous wavelet transform methods (Contributo in atti di convegno)

Type

• Contributo in atti di convegno (Classe)
• Prodotto della ricerca (Classe)

Label

• Similarities and differences of SAR derived wind fields using two different methods: The local gradient and the continuous wavelet transform methods (Contributo in atti di convegno) (literal)

Anno

• 2008-01-01T00:00:00+01:00 (literal)

Alternative label

• Stefano Zecchetto; F. Nirchio; F. De Biasio; S. Di Tomaso (2008)
  Similarities and differences of SAR derived wind fields using two different methods: The local gradient and the continuous wavelet transform methods
  in The 2nd International Workshop on Advances in SAR Oceanography from ENVISAT and ERS missions, Frascati, Italy, 21-25 January 2008
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Stefano Zecchetto; F. Nirchio; F. De Biasio; S. Di Tomaso (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume

• European Space Agency, (Special Publication) ESA SP (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana

• 656 (literal)

Note

• Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Istituto Scienze dell'Atmosfera e del Clima - CNR / Agenzia Spaziale Italiana - Loe. Terlecchia / Istituzione Centro Previsioni e Segnalazioni Maree / Agenzia Spaziale Italiana - Loe. Terlecchia (literal)

Titolo

• Similarities and differences of SAR derived wind fields using two different methods: The local gradient and the continuous wavelet transform methods (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn

• 978-92-9221-220-9 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume

• H. Lacoste ; L. Ouwehand (literal)

Abstract

• We present a discussion about the performances of two different methods to derive the wind field from SAR images. These are the method based on the Continuous Wavelet Transform (CWT2) (Zecchetto & De Biasio 2002, 2007) and on the estimation of the Local Gradient (LG) (Koch 2004). The CWT2 method extracts the backscatter signatures in the SAR image likely related to the structure of the marine atmospheric boundary layer; it derives the aliased wind direction from direction of the major axis of the cells-like detected structures and then resolves the ambiguity looking at the backscatter distribution inside them. The LG method divides the image into sub images, depending on the space grid over which the wind is requested; then it defines four image operators which are applied on the images to produce a map of valid points on which the local gradient directions are computed. The local wind direction is orthogonal to the more frequent gradient direction. The wind intensity is computed applying the CMOD4 or CMOD5 models for C-band scatterometer. The results of the two methods are compared with satellite scatterometer winds. They are relevant to ERS images taken over the Mediterranean Sea. (literal)

Editore

• ESA Communication Production Office, ESTEC (Editore)

Prodotto di

• Institute of atmospheric sciences and climate (ISAC) (Istituto)
• Processi di scambio e strato limite atmosferico (TA.P06.017.002) (Modulo)

Autore CNR

• STEFANO ZECCHETTO (Persona)
• FRANCESCO DE BIASIO (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Similarities and differences of SAR derived wind fields using two different methods: The local gradient and the continuous wavelet transform methods" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of atmospheric sciences and climate (ISAC) (Istituto)
• Processi di scambio e strato limite atmosferico (TA.P06.017.002) (Modulo)

Autore CNR di

• STEFANO ZECCHETTO (Persona)
• FRANCESCO DE BIASIO (Unità di personale interno)

Editore di

• ESA Communication Production Office, ESTEC (Editore)

Insieme di parole chiave di

• Keywords of "Similarities and differences of SAR derived wind fields using two different methods: The local gradient and the continuous wavelet transform methods" (Insieme di parole chiave)