ALMA’s Japanese 7-meter Antennas

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ALMA’s Japanese 7-meter Antennas

These antennas are the 7-meter antennas built by our Japanese partners. All together, there are 12 of these smaller antennas that are all located close to the center of the overall array. They work in conjunction with four other 12-meter antennas to form the Atacama Compact Array (ACA). Because of the extremely close spacing, the ACA is able to very accurately simulate a single antenna and image very faint objects visible in the millimeter/submillimeter part of the electromagnetic spectrum.

Credit: NRAO/AUI/NSF

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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.
	The U.S. National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."
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