Flow velocities along the central meridian and along the equator as a function of the distance to disk center for different datasets. Solid blue line: HMI data along the central meridian; dashed red line: HMI data along the equator; black triangles: STAGGER data with full spatial resolution; green circles: STAGGER data convolved with a PSF (Airy-function); and orange diamonds: STAGGER data convolved with the PSF from Couvidat et al. (2016). The HMI data are averaged over latitude/longitude and time, the STAGGER data are averaged over x, y, and time. The error bars are smaller than the symbol size or the thickness of the line.