Abstract
Wind speed and direction are estimated from backscatter /spl sigma//sup 0/ measurements at two adjacent subscenes of RADARSAT-1 synthetic aperture radar (SAR) images, each subscene with slightly different incidence angles. Resultant wind vectors are validated using in situ buoy measurements, and compared with SAR-derived wind vectors obtained by using the wind directions determined from a spectral analysis of SAR images and colocated QuikSCAT measurements, as inputs to a hybrid model wind retrieval model. The implemented hybrid model consists CMOD-IFR2 (applicable to C-band, VV polarization) and the C-band copolarization ratio for Kirchhoff scattering. The new algorithm displays improved skill in wind vector estimation from RADARSAT-1 SAR data.
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