  We measure the angular two-point correlation and angular power spectrum from
the NRAO VLA Sky Survey (NVSS) of radio galaxies. They are found to be
consistent with the best-fit cosmological model from the Planck analysis, and
with the redshift distribution obtained from the Combined EIS-NVSS Survey Of
Radio Sources (CENSORS). Our analysis is based on an optimal estimation of the
two-point correlation function and makes use of a new mask, that takes into
account direction dependent effects of the observations, sidelobe effects of
bright sources and galactic foreground. We also set a flux threshold and take
the cosmic radio dipole into account. The latter turns out to be an essential
step in the analysis. This improved cosmological analysis of the NVSS
emphasizes the importance of a flux calibration that is robust and stable on
large angular scales for future radio continuum surveys.
