  We obtain sufficient conditions for arrays of points,
$\mathcal{Z}=\{\mathcal{Z}(L) \}_{L\ge 1},$ on the unit sphere
$\mathcal{Z}(L)\subset \mathbb{S}^d,$ to be Marcinkiewicz-Zygmund and
interpolating arrays for spaces of spherical harmonics. The conditions are in
terms of the mesh norm and the separation radius of $\mathcal{Z}(L)$.
