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Published online by Cambridge University Press: 02 August 2016
Infrared Interferometry promises to be a useful astrometric technique. Preliminary measurements of the star α Orionis made with a heterodyne interferometer exhibit phase coherence over a period of at least 1000 seconds. The measurements were equivalent to a positional determination of 60 second accuracy every 5 seconds of integration.
This work is supported in part by NASA Grant NGL 05-003-272 and NSF Grant AST 77-12256