Top panels: comparison of measured patterns (full line) to the corresponding LFI-only best-fit retrieved patterns (dashed line), for two individual detectors at 70 GHz: on the left is an example of a poor fit (high variance δ), 18S; and on the right a good fit (low variance), 20S. Bottom panels: difference in power between the above patterns, integrated up to a given radial angle, as a function of that angle; these plots are useful to identify where the major differences occur. We also show the equivalent curves (in red) for the RFFM pattern.