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Proceedings Paper

A metrology concept for multiple telescope astrometry
Author(s): M. Gai; D. Busonero; A. Riva
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Paper Abstract

Medium to large angle observations, e.g. for global astrometry, can be implemented in space by means of either a common telescope, fed by a Beam Combiner (as in Hipparcos), or by individual telescopes set in a rigid geometry (as in Gaia). We investigate the applicability of auto-collimation and cophasing techniques for implementation of a monitoring system alternative to more conventional point-to-point metrology. Apart different implementation constraints, the most relevant difference consists in the auto-collimation approach characteristics of monitoring simultaneously comparably large sections of the optical system, thus evaluating collective properties closer to those experienced by the stellar beams.

Paper Details

Date Published: 21 September 2012
PDF: 10 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84421O (21 September 2012); doi: 10.1117/12.926767
Show Author Affiliations
M. Gai, INAF - Osservatorio Astronomico di Torino (Italy)
D. Busonero, INAF - Osservatorio Astronomico di Torino (Italy)
A. Riva, INAF - Osservatorio Astronomico di Torino (Italy)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann, Editor(s)

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