scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...

STP12 Abstracts
Berlin, 12 - 16 July 2010
SCOSTEP Symposium 2010
Sunspot databases of Debrecen
Baranyi Tünde , Győri Lajos , Ludmány András
Heliophysical Observatory of the Hungarian Academy of Sciences
The Heliophysical Observatory is the source of the most detailed sunspot data. The DPD
(Debrecen Photoheliographic Data) is made by using ground-based observations, it is the
continuation of the Greenwich Photoheliographic Results. The SDD (SOHO/Debrecen
sunspot Data) is based on space-borne observations, its resolution is lower in space and higher
in time than those of DPD. The digitized historical material will later serve as a basis of a
long-term catalogue. We give an introduction of these materials and some comparisons with
other sunspot datasets concerning data types, precision, biases (with emphasis on area data)
and solutions of presentation. Secondary datasets are also derived (e.g. sunspot group tilts,
recurrent active regions) or planned (classification of active region types).