7. Preparing for Hipparcos (Lennart Lindegren)

Lennart Lindegren (Svalöv, Sweden, 1950) was a central figure in the development of the Hipparcos mission during the 1970s, he was one of the leaders of the three Hipparcos data analysis teams in the 1980s and 1990s, he was central to the formulation and development of Gaia in the 1990s and 2000s, and his work continues intensively today, focused on the analysis of the satellite data. We talk about what took him into space astrometry, and about his involvement in the preparation of Hipparcos.