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Proceedings Paper

Global astrometry with OSI
Author(s): Sacha Loiseau; Fabien Malbet; Jeffrey W. Yu
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Paper Abstract

We present a method for performing global astrometry with the proposed Orbiting Stellar Interferometer. Because it is dedicated to wide-angle astrometry, OSI has the intrinsic capabilities to achieve global astrometry, even though it doesn't measure directly relative angles between pairs of stars, such as HIPPARCOS. In this paper, a time-independent model is shown, leading to a coherent solution for the positions of reference stars on the whole sky. With an initial measurement accuracy of 10 micro-arcseconds, corresponding to an accuracy of 340 picometers in the knowledge of the delay-line position of the observing interferometer, the consistent least-squares solution gives an accuracy by which the astrometric parameters can be obtained around 2 - 3 micro-arcseconds.

Paper Details

Date Published: 26 June 1995
PDF: 8 pages
Proc. SPIE 2477, Spaceborne Interferometry II, (26 June 1995); doi: 10.1117/12.212997
Show Author Affiliations
Sacha Loiseau, Ctr. National d'Etudes Spatiales (France)
Fabien Malbet, Observatoire de Grenoble (France)
Jeffrey W. Yu, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 2477:
Spaceborne Interferometry II
Robert D. Reasenberg, Editor(s)

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