Green Bank Interferometer

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Green Bank Interferometer

All three 85-foot telescopes of the roughly east-west arm of the Green Bank Interferometer, the NRAO’s first array. A fourth member of the GBI would have been in operation about 13 miles away. The GBI operated from 1967-2006. From 1978-1996, it was operated in support of USNO and NRL geodetic and astronomy programs; after 1996 in support of NASA High Energy Astrophysics programs.

Credit: NRAO/AUI/NSF

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Green Bank Interferometer

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The National Radio Astronomy Observatory is a facility of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
	Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.
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