  Using data from the SUGAR and the AGASA experiments taken during a 10 yr
period with nearly uniform exposure to the entire sky, we search for
large-scale anisotropy patterns in the arrival directions of cosmic rays with
energies > 10^{19.6} eV. We determine the angular power spectrum from an
expansion in spherical harmonics for modes out to \ell=5. Based on available
statistics, we find no significant deviation from isotropy. We compare the
rather modest results which can be extracted from existing data samples with
the results that should be forthcoming as new full-sky observatories begin
operation.

Astrophysics;High Energy Physics - Experiment;High Energy Physics - Phenomenology