We have previously shown that Stokes eigenvectors can be numerically extracted from the Kennaugh(Stokes)
matrices of both single-look and multilook fully polarimetric SIR-C data. The extracted orientation and ellipticity
parameters of the Stokes eigenvector were found to be related to the Huynen orientation and helicity parameters
for single-look fully polarimetric SIR-C data. We formally show in this paper that these two parameters, which
diagonalize the Sinclair matrices of the single-look data, belong to a set of parameters which diagonalize the
Kennaugh matrices of single-look data. Along with the cross sections kSvvk2, kShvk2, kShhk2 and the Span, the
eigenvalues of the Kennaugh matrix and the covariance matrix are used as input features in the development of
a neural net landcover classifier for SIR-C data.