  The purpose of this work is to characterize the diffuse Galactic polarized
synchrotron. We present EE, BB, and EB power spectra estimated
cross-correlating Planck and WMAP polarization frequency maps at 23 and 30 GHz,
for a set of six sky regions covering from 30% to 94% of the sky. The EE and BB
angular power spectra show a steep decay of the spectral amplitude as a
function of multipole, approximated by a power law with power indices around
-2.9 for both components. The B/E ratio is about 0.22. The EB cross-component
is compatible with zero at 1$\sigma$, with upper constraint on the EB/EE ratio
of 1.2% at the 2$\sigma$ level. The recovered SED, in the frequency range 23-30
GHz, shows E and B power-law spectral indices compatible between themselves
with a value of about -3.
