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Proceedings Paper

Equivalent focal length measurements
Author(s): Guy Edouard Artzner; Frederic Auchere; Jean-Pierre Delaboudiniere; Jean-Francois E. Hochedez
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Paper Abstract

Converting linear coordinates in the plane of the detector of an astronomical instrument to celestial coordinates involves in principle the equivalent focal length of the instrument. However, most methods in astrometry manage to reduce observations in a global manner without actually measuring a focal length. We point out a case for solar space observations where the long term stability of angular distance measurements is better than the ground calibration of the angular value of a pixel. We report and discuss this ground calibration.

Paper Details

Date Published: 27 August 1999
PDF: 5 pages
Proc. SPIE 3737, Design and Engineering of Optical Systems II, (27 August 1999); doi: 10.1117/12.360014
Show Author Affiliations
Guy Edouard Artzner, Univ. de Paris-Sud (France)
Frederic Auchere, USRA/NASA Goddard Space Flight Ctr. (United States)
Jean-Pierre Delaboudiniere, Univ. de Paris-Sud (France)
Jean-Francois E. Hochedez, Hochedez Consultants (Belgium)


Published in SPIE Proceedings Vol. 3737:
Design and Engineering of Optical Systems II
Fritz Merkle, Editor(s)

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