Lennart Lindegren
Professor
Basic principles of scanning space astrometry
Author
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