  Echelle spectrographs with their high resolution plays important role in
determination of characteristics of stellar lines. Wide field of applications
is focused mainly on the measurements of precise radial velocity applied in
exoplanetary research. In my diploma thesis I am concentrated on the
calibration of the Ond\v{r}ejov Echelle Spectrograph at Astronomical Institute
of the Czech Academy of Sciences. My role was to investigate the wide field of
opportunities how to process the data with the best possible results.
Successful reduction was performed by both Image Reduction and Analysis
Facility (IRAF) and for Open source Pipeline for ESPaDOnS Reduction and
Analysis. This thesis includes the comparison of both pipelines.
