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Modelling the Hipparcos Attitude

Published online by Cambridge University Press:  15 February 2011

C. Turon ,
F. Meynadier ,
F. Arenou  and
F. van Leeuwen
F. van Leeuwen*
Affiliation:
Institute of Astronomy, Cambridge, UK
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Abstract

A detailed study of the Hipparcos attitude exposed events in the satellite’s motion (micro-meteorite hits and clanks) that require special adaptations in the attitude reconstruction modelling. Identifying these events in the data stream, and incorporating them in a specially designed dynamical attitude modelling, has led to an overall reduction in the attitude reconstruction noise from 3 mas down to 0.6 mas. Considering that the main noise contribution on the astrometric data for stars brighter than magnitude 8 in the Hipparcos catalogue originated from the attitude reconstruction, and that this noise led to correlated parallax errors for neighbouring stars, it was decided to redo the astrometric reductions of the Hipparcos data. This was completed in 2007, and resulted in the publication of a new catalogue. The lesson to be learnt for Gaia is, that incorporating a detailed understanding of the satellite’s motions in the attitude modelling can have a significant impact on the overall reliability of the final astrometric data produced by the mission.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 45: GAIA: At the Frontiers of Astrometry , 2010 , pp. 41 - 46
Copyright
© EAS, EDP Sciences 2011

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References

Références

ESA (ed.), 1997, The Hipparcos and Tycho Catalogues, ESA SP-1200, ESA
Evans, D.W., 2003, in The Future of Small Telescopes In The New Millennium, Vol. II - The Telescopes We Use, 49
Fantino, E., 2000, Ph.D. Thesis, Universita’ degli studi di Padova
Fantino, E., & van Leeuwen, F., 2003, Space Sci. Rev., 108, 499 CrossRef
Kovalevsky, J., Falin, J.L., et al., 1992, A&A, 258, 7
Lindegren, L., 2005, ed. C. Turon, K.S. O’Flaherty, & M.A.C. Perryman, The Three-Dimensional Universe with Gaia, ESA SP-576, 29
Lindegren, L., Hoeg, E., van Leeuwen, F., et al., 1992, A&A, 258, 18
O’Mullane, W., Lammers, U., et al., 2007, ed. R.A. Shaw, F. Hill, & D.J. Bell, Astronomical Data Analysis Software and Systems XVI, Vol. 376 of Astron. Soc. Pac. Conf. Ser., 99
van der Marel, H., & Petersen, C.S., 1992, A&A, 258, 60
van Leeuwen, F., 2007a, Hipparcos, the new reduction of the raw data (Springer, Dordrecht)
van Leeuwen, F., 2007b, A&A, 474, 653 PubMed
van Leeuwen, F., & Fantino, E., 2003, Space Sci. Rev., 108, 537 CrossRef
van Leeuwen, F., & Fantino, E., 2005, A&A, 439, 791