Phase-coherent astrometric interferometry

Details Phase-coherent astrometric interferometry Phase-coherent astrometric interferometry

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mit..reptr....s&link_type=abstract

Final Report, 1 Feb. 1986 - 30 Jun. 1988 Massachusetts Inst. of Tech., Cambridge. Research Lab. of Electronics.

Astronomy and Astrophysics

Astrophysics

Astrometry, Astronomy, Astrophysics, Celestial Sphere, Diameters, Interferometers, Interferometry, Stellar Color, Atmospheric Circulation, California, Marine Technology, Massachusetts, Navy, Observatories, Research Facilities

Scientific paper

This effort constituted the second stage in the development of the Mark III stellar interferometer, which is a fringe-tracking long-baseline Michelson interferometer designed primarily for wide angle astrometry at the milliarc-second level. Stellar diameters were also measured. The instrument is installed on Mount Wilson in California; it is a joint project between the Massachusetts Institute of Technology, the Smithsonian Astrophysical Observatory, the Naval Research Laboratory, and the U.S. Naval Observatory. The instrument employs a two-color technique to reduce errors due to atmospheric turbulence, and its various baselines are laser-monitored to achieve high precision. The instrument can operate with four possible baseline configurations from 9 m NE-SW to 20 m N-S. Most observations have been made with the 12-m N-S baseline.

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