Searchable version of the Debrecen Photoheliographic Data catalogue

The Debrecen Photoheliographic Data (DPD) sunspot catalogue contains the heliographic positions and the areas of the sunspots and sunspot groups. The searchable version of DPD are created from the text version of the catalogue available at the ftp site of the Debrecen Observatory. Concerning the detailed information on the sunspot data of DPD see DPDformat.txt and README.txt files. The data in ASCII files are loaded into a relational MySQL database with the structure corresponding to the original document completed the "d" and "g" rows with some zero values to form a unified 18-column format. The database is searchable by time, size, and different position data via this website. The search results can be retrieved by users as ASCII files.
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