SCDU (Spectral Calibration Development Unit) testbed Narrow angle astrometric performance

Xu Wang*, Renaud Goullioud, Bijan Nemati, Michael Shao, Udo J. Wehmeier, Mark A. Weilert, Thomas A. Werne, Janet P. Wu, Chengxing Zhai

*Corresponding author for this work

Research output: Chapter in Book/Conference Proceeding/ReportConference Paper published in a bookpeer-review

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.

Original languageEnglish
Title of host publicationOptical and Infrared Interferometry II
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventOptical and Infrared Interferometry II - San Diego, CA, United States
Duration: 27 Jun 20102 Jul 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7734
ISSN (Print)0277-786X

Conference

ConferenceOptical and Infrared Interferometry II
Country/TerritoryUnited States
CitySan Diego, CA
Period27/06/102/07/10

Keywords

  • Astrometry
  • Interferometer
  • Narrow angle
  • SCDU
  • SIM
  • Spectral calibration

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