Results of processing of digitized astronomical photographic plates

📒 The set of papers includes eight articles written in co-authorship with astronomers from various astronomical institutions from Ukraine, Latvia, Uzbekistan, Germany. Special attention is paid to the reduction of photographic observations in the reference frame of Tycho-2 stellar catalogue and to the study and elimination of systematic errors of commercial scanners Microtek and Epson used as instruments of plate digitizing. The results obtained from processing of digitized photographic plates of stellar fields using the software applications created by the author in the LINUX / MIDAS / ROMAFOT environment are discussed.