R. Touzi et A. Lopes, STATISTICS OF THE STOKES PARAMETERS AND OF THE COMPLEX COHERENCE PARAMETERS IN ONE-LOOK AND MULTILOOK SPECKLE FIELDS, IEEE transactions on geoscience and remote sensing, 34(2), 1996, pp. 519-531
Barakat [1] derived the Stokes parameter statistics, applicable to one
-look Synthetic Aperture Radar (SAR) images, of a partially polarized
wave backscattered from a Gaussian area. In this paper, the statistics
of the Stokes parameters and of the phase difference are derived as a
function of the mean effective phase difference and the degree of coh
erence for one-look and multilook SAR data. The statistics of the degr
ee of coherence are also derived for multilook SAR data. It is shown t
hat the estimator currently used for calculation of the degree of cohe
rence is biased under low coherence conditions.