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Lennart Lindegren. Profile picture.

Lennart Lindegren

Professor

Lennart Lindegren. Profile picture.

Basic principles of scanning space astrometry

Author

  • Lennart Lindegren
  • U. Bastian

Summary, in English

We outline the basic principles of scanning space astrometry, such as represented by Hipparcos, Gaia, and some other astrometric satellites planned or proposed. We explain the need for large-angle measurements, why these are essentially one-dimensional, how it is possible to determine absolute parallaxes, and why a Hipparcos-type scanning law is favourable. We discuss the choice of the basic angle between the two viewing directions, the principle of self-calibration, and why the resulting numerical problem must be difficult to solve.

Department/s

  • Lund Observatory - Has been reorganised

Publishing year

2011

Language

English

Pages

109-114

Publication/Series

EAS Publications Series

Volume

45

Issue

GAIA: At the Frontiers of Astrometry

Document type

Journal article

Publisher

EDP Sciences

Topic

  • Astronomy, Astrophysics and Cosmology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1633-4760