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The USNO Astrometric Interferometer

Published online by Cambridge University Press:  19 July 2016

Donald J. Hutter
Donald J. Hutter*
Affiliation:
United States Naval Observatory, USNO/NRL Optical Interferometer Project, AD5, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420

Abstract

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The U.S. Naval Observatory Astrometric Interferometer (USNOAI) will be the dedicated astrometric sub-array of the new Navy Prototype Optical Interferometer (NPOI) at Lowell Observatory, which is being built in collaboration with the Naval Research Laboratory. The USNOAI will be in operation on Anderson Mesa, near Flagstaff, Arizona, in late 1993. The instrument will incorporate four siderostats which will be located in a Y-shaped configuration, and will feature state-of-the-art delay lines, a real-time zeroth-order fringe tracking algorithm, a full-array laser metrology system to monitor baseline motion, and a limiting magnitude of 10. The instrument will be capable of simultaneous observations on six baselines, and will produce star positions accurate to a few mas. With it, we will be able to maintain the HIPPARCOS reference frame with matching accuracy over the next few decades.

Type
Astrometry
Information
Symposium - International Astronomical Union , Volume 158: Very High Angular Resolution Imaging , 1994 , pp. 427 - 435
Copyright
Copyright © Kluwer 1994 

References

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