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Proceedings Paper

NEAT breadboard system analysis and performance models
Author(s): François Hénault; Antoine Crouzier; Fabien Malbet; Pierre Kern; Guillermo Martin; Philippe Feautrier; Eric Staedler; Sylvain Lafrasse; Alain Delboulbé; Jean-Michel Le Duigou; Christophe Cara; Alain Léger
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Paper Abstract

NEAT (Nearby Earth Astrometric Telescope) is an astrometric space mission aiming at detecting Earth-like exoplanets located in the habitable zone of nearby solar-type stars. For that purpose, NEAT should be able to measure stellar centroids within an accuracy of 5 10-6 pixels. In order to fulfil such stringent requirement, NEAT incorporates an interferometric metrology system measuring pixel gains and location errors. To validate this technology and assess the whole performance of the instrument, a dedicated test bench has been built at IPAG, in Grenoble (France). In this paper are summarized the main system engineering considerations allowing to define sub-systems specifications. Then we describe the general architecture of the performance models (including photometric, interferometric, and final astrometric budgets) and confront their predictions with the experimental results obtained on the test bench. It is concluded that most of error items are well understood, although some of them deserve further investigations.

Paper Details

Date Published: 4 August 2014
PDF: 14 pages
Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 91500I (4 August 2014); doi: 10.1117/12.2055098
Show Author Affiliations
François Hénault, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Antoine Crouzier, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Fabien Malbet, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Pierre Kern, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Guillermo Martin, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Philippe Feautrier, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Eric Staedler, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Sylvain Lafrasse, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Alain Delboulbé, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS, Univ. Joseph Fourier (France)
Jean-Michel Le Duigou, Ctr. National d'Études Spatiales (France)
Christophe Cara, Lab. AIM, CNRS, Univ. Paris Diderot (France)
Alain Léger, Institut d'Astrophysique Spatiale, CNRS, Univ. Paris Sud (France)


Published in SPIE Proceedings Vol. 9150:
Modeling, Systems Engineering, and Project Management for Astronomy VI
George Z. Angeli; Philippe Dierickx, Editor(s)

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