Analysis of spectral line profile asymmetries on records of Multichannel Flare Spectrograph archive

Spectral line profiles of solar flares may indicate so-called line profile asymmetries, which originate due to vertical mass motions in flaring atmosphere. Detailed analysis of asymmetries observed in different spectral lines can afford information about motions of flaring atmosphere or its vertical velocities. Archive of Ondejov Multichannel Flare Spectrograph contains records of several hundreds flares observed between 1995 and 2004. The contribution shows first results of statistical processing of the archive on sample of several flares observed between 1999 and 2001. Possibilities of further analysis of collected observations on the basis of method comparing observed and non-LTE calculated profiles is also outline.