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Symmetrization of cross-polarized responses in polarimetric radar images using reciprocity

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3 Author(s)
Yueh, S.H. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Nghiem, S.V. ; Kwok, R.

A new method for symmetrizing polarimetric scattering matrices is applied to the polarimetric synthetic aperture radar (SAR) images acquired over Mount Shasta. This method symmetrizes the cross-polarized responses in the polarimetric images using a 2×2 matrix derived from the image itself and based on the reciprocal property of natural distributed targets. The covariance parameters of the in-scene trihedral reflectors are presented to demonstrate the effectiveness of this method. The results are also compared with those obtained by the symmetrization technique employed by POLCAL, before and after crosstalk removal. Before crosstalk is removed from the images, there were no significant differences between the results obtained by the POLCAL method and the new method for the covariance parameters of trihedral reflectors. After crosstalk removal, using distributed targets with reflection symmetry, the new symmetrization method outperformed the POLCAL method

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:31 ,  Issue: 6 )

Date of Publication:

Nov 1993

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