Research fields: Sunspots, fine structure in solar photosphere, high spatial resolution photometry and spectroscopy, interpretation of spectra, image processing, time-series analysis, instrumentation. 1978 graduated in Astrophysics from Charles University, Prague. 1981-1985 external PhD student at the Leningrad State University and Crimean Astrophysical Observatory. 1985 PhD in Astrophysics, Leningrad State University. 1990-1992 Postdoctoral Fellowship at the Instituto de Astrofisica de Canarias (IAC). 1993 three-month European Community Grant at IAC. 1999 Visiting Professor at the Karl-Franzens University, Graz. 1999-2000 one-year sabbatical stay at IAC. 2003 researcher at Observatoire Midi Pyrénées, Tarbes. Since 1979 at the Astronomical Institute, Solar Department, since 1995 Head of the Working Group "Structure and Dynamics of Solar Atmosphere", since 2004 Deputy Head of the Solar Department. Since 2002 Vice-President of JOSO. Cooperation with institutions in Spain, France, Germany, Austria, and USA. Author and co-author of more than 100 astronomical publications.
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