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Proceedings Paper

SCDU (Spectral Calibration Development Unit) testbed narrow angle astrometric performance
Author(s): Xu Wang; Renaud Goullioud; Bijan Nemati; Michael Shao; Udo J. Wehmeier; Mark A. Weilert; Thomas A. Werne; Janet P. Wu; Chengxing Zhai
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Paper Abstract

The most stringent astrometric performance requirements on NASA's SIM(Space Interferometer Mission)-Lite mission will come from the so-called Narrow-Angle (NA) observing scenario, aimed at finding Earth-like exoplanets, where the interferometer chops between the target star and several nearby reference stars multiple times over the course of a single visit. Previously, about 20 pm NA error with various shifts was reported1. Since then, investigation has been under way to understand the mechanisms that give rise to these shifts. In this paper we report our findings, the adopted mitigation strategies, and the resulting testbed performance.

Paper Details

Date Published: 21 July 2010
PDF: 14 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77344J (21 July 2010); doi: 10.1117/12.857278
Show Author Affiliations
Xu Wang, Jet Propulsion Lab. (United States)
Renaud Goullioud, Jet Propulsion Lab. (United States)
Bijan Nemati, Jet Propulsion Lab. (United States)
Michael Shao, Jet Propulsion Lab. (United States)
Udo J. Wehmeier, Jet Propulsion Lab. (United States)
Mark A. Weilert, Jet Propulsion Lab. (United States)
Thomas A. Werne, Jet Propulsion Lab. (United States)
Janet P. Wu, Jet Propulsion Lab. (United States)
Chengxing Zhai, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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