PREDNASAJUCI / LECTURER : Jan Rybak NAZOV / TITLE : LSO/KSO H alpha prominence catalogue - cross-calibration issues ABSTRAKT / ABSTRACT : Prompt report on extension of the Lomnicky Peak Obsevatory (LSO) H alpha prominence catalogue for the epoch 1967 - 2009 (Rusin et al., 1988, 1994) onwards incorporating observations of the Kanzelhoehe Observatory for Solar and Environmental Research (KSO) is presented. Main aim is focused on cross-calibration issues faced when comparing data acquired at two observatories using different observing setup and detection techniques. Using data of 20 common prominences gained in 5 different days in August/September 2009 significance of differences of the derived prominence parameters are investigated. Reduction of the Kanzelhoehe observations and following adaptation of the KSO prominence parameters to the Lomnicky peak prominence catalogue scale are presented, confirming that no special homogenisation is needed to create a common catalogue data set. The new common LSO/KSO H alpha prominence catalogue is intended to be continued in the future.