Assessment of OceanWind Retrieval from Dual-Polarized X-band SAR data

Conference: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
04/23/2012 - 04/26/2012 at Nuremberg, Germany

Proceedings: EUSAR 2012

Pages: 4Language: englishTyp: PDF

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Said, Faozi (Department of Physics and Technology, University of Tromsø, Romssa universitehta. N-9037 Tromsø, Norway)
Johnsen, Harald (Norut Tromsø, Norway)

Assessment of wind speed retrieval from dual-polarized X-band SAR data is performed using geophysical model functions for the normalized radar cross-section (NRCS) and the Doppler frequency. It is shown that the retrieved wind speed accuracy is similar for VV (standard deviation of 2.33 m/s) and HH (standard deviation of 2.32 m/s) polarizations. The geophysical Doppler model is used to assess the potential of using the polarization residual (VV-HH) Doppler frequency (PRDF) estimated from dual-polarized SAR data, in future wind speed retrieval algorithms. A correlation of 0.79 is achieved between the in situ radial wind speed component and the estimated PRDF