Neglect of Small Spots Remains an Explanation of the Difference Between SOON and RGO Spot Areas

Abstract

Abstract I point out that the objection of Györi et al. to my finding that neglect of small spots could explain much of the puzzling difference between Royal Greenwich Observatory and Solar Optical Observation Network spot areas is not valid because their analysis was limited to only 1974–76, when activity was low. The 40%–50% difference occurs only at higher activity levels.