Patting the Subreflector Actuator

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Patting the Subreflector Actuator

Green Bank Engineer Dennis Egan is nearly 400 feet above the ground at the end of the feed arm of the Green Bank Telescope. He is working on the motors that gently adjust the position of the telescope’s secondary reflector, a small dish that aims the GBT’s collected radio waves down into its receivers.

Credit: R. Monk, NRAO/AUI/NSF

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Patting the Subreflector Actuator

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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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