Comparative analysis of Debrecen sunspot catalogues

摘要: Sunspot area data are important for studying solar activity and its long term variations. At the Debrecen Heliophysical Observatory, we compiled three sunspot catalogues: Photoheliographic Data (DPD), SDO/HMI (HMIDD), SOHO/MDI Data. For comparison, also an additional catalogue, Greenwich Data, from digitized Royal Observatory images 1974-76. By comparing these catalogues when they overlap in time, can investigate how various factors influence measured of sunspots, and, addition, derive cross-calibration catalogues.The main findings as follows. The poorer seeing increases individual corrected spot areas decreases number small spots. Interestingly, net result two effects total is zero. DPD daily 5 per cent smaller than HMIDD ones. Revised umbra 9 those HMIDD. Result only a few areas. A $0.2^{\circ}$ difference between North directions MDI found. This value nearly same that was found ($0.22^{\circ}$) by us previous paper HMI images. Solar Observing Optical Network measurement practice (spots $10 mh$ were not directly but $2 assigned to each) explain large deficit Network.