Noise residual full-sky power spectra when using different internal sky resolution for polarization in the offset determination. Internal resolution for intensity is fixed to nside = 1024. Residual maps are at nside = 1024. Spectra are smoothed over five multipoles. Signal spectra are plotted in red. As a reference, we also plot the CMB WMAP five-year fiducial model (black). From left to right: temperature, E-mode, and B-mode.