1. Lennart Lindegren is a member of the staff at Lund Observatory, Sweden, where he obtained his PhD in 1980, and became a full professor of astronomy in 2000.
14 Facts About Lennart Lindegren
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Lennart Lindegren's career has been marked by his continuous involvement in, leadership of, and profound contributions to, ESA's Hipparcos and Gaia missions over their entire duration.
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Lennart Lindegren set out the overall principles of the astrometric data reduction aiming to combine and solve together the attitude, the system and the astrometric parameters of the stars.
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Already by the end of 1976, Lindegren had produced a set of definitive technical notes and simulations showing how to obtain a 'rigid sphere' with all astrometric parameters from a scanning satellite.
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From 1990 Lennart Lindegren led the Consortium NDAC sharing with FAST the data processing of Hipparcos.
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Lennart Lindegren was member of ESA's Hipparcos Science Team for the entire duration of the project.
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The study was led by Lennart Lindegren and contains his brilliant mathematical analysis of the simulations, but he modestly left the position as first author to another person.
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Again, Lennart Lindegren was instrumental in the initial design of what was in the early phase an interferometer and in the assessment of the astrometric accuracy achievable.
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Lennart Lindegren led the detailed design of the overall scheme of the astrometric solution, being a block iterative adjustment determining the attitude, the calibration and the system directly from the CCD images.
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Lennart Lindegren was a member of the ESA Gaia Science Advisory Group before mission selection, and the Gaia Science Team since selection in 2000.
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Lennart Lindegren's publications include more than 90 refereed papers on astrometry, reference frames, data processing, spectroscopy and instrument design.
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Lennart Lindegren is a co-author of the canonical paper on the IAU 2000 'Resolutions for Astrometry, Celestial Mechanics, and Metrology in the Relativistic Framework'.
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On 19 May 1999, Lennart Lindegren was awarded the ESA's Director of Science Medal for his extraordinary efforts in ESA's scientific missions.
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In 2009, Lennart Lindegren was elected as a member of the Royal Swedish Academy of Sciences.