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26 June 1995 Orbiting stellar interferometer
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The Orbiting Stellar Interferometer (OSI) is a concept for a first-generation space interferometer with astrometric and imaging capabilities and its responsive to the recommendations of the Astronomy and Astrophysics Survey Committee for an astrometric interferometry mission. OSI is a triple Michelson interferometer with articulating siderostats and optical delay lines. The design uses a 7 m maximum baseline and aperture diameters of 33 cm; the targeted astrometric performance is a wide-field accuracy of 5 (mu) as for 20-mag objects. The instrument would also be capable of synthesis imaging with a resolution of 10 mas. Laser metrology is used to relax structural requirements thereby reducing cost. The currently envisaged flight system fits into an Atlas II shroud, for insertion into a 900 km sun- synchronous orbit.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Shao and Donna M. Wolff "Orbiting stellar interferometer", Proc. SPIE 2477, Spaceborne Interferometry II, (26 June 1995);

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