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	Arecibo radio telescope
		It is located at the Arecibo Observatory, is operated by Cornell University for the National Science Foundation, and came into operation in 1963 and.
		The surface of Arecibo's 305-meter (1,000-foot) fixed, spherical dish is made from almost 40,000 perforated aluminum panels, each measuring 1 meter by 2 meters (3 feet by 6 feet), supported by a network of steel cables strung across the underlying depression.
		Although the telescope is not steerable, some directionality is obtained by moving the feed antenna (upgraded in 1996).
	www.daviddarling.info /encyclopedia/A/Arecibor.html (204 words)

	Arecibo Observatory - Wikipedia, the free encyclopedia
		The Arecibo telescope is distinguished by its enormous size; the main collecting dish is 305 m in diameter, constructed inside the depression left by a karst sinkhole.
		The Arecibo telescope's dish surface is made of 38,778 perforated aluminium panels, each measuring about 1 m by 2 m (3 ft by 6 ft), supported by a mesh of steel cables.
		The construction of the Arecibo telescope was initiated by Professor William E. Gordon of Cornell University, who originally intended to use it for the study of Earth's ionosphere.
	en.wikipedia.org /wiki/Arecibo_radio_telescope (960 words)

	Radio telescope - Wikipedia, the free encyclopedia
		The largest radio telescope in Europe is the 100 meter diameter antenna in Effelsberg, Germany, which also was the largest fully steerable telecope for 30 years until the Green Bank Telescope was opened in 2000.
		A typical size of the single antenna of a radio telescope is 25 metre, dozens of radio telescopes with comparable sizes are operated in radio observatories all over the world.
		Grote Reber (December 22, 1911 – December 20, 2002) was one of the pioneers of radio astronomy.
	en.wikipedia.org /wiki/Radio_telescope (524 words)

	arecibo radio telescope (Site not responding. Last check: 2007-10-19)
		The Arecibo radio telescope is located in Puerto Rico about 10 km south of the town of Arecibo, which is located on the north coast of the island.
		The Arecibo telescope is one of the most famous such telescopes in the world, distinguished by its enormous size; the main collecting dish is 305 meters in diameter, constructed inside the depression left by a karst sinkhole.
		The Arecibo telescope's dish surface is made of 38,778 perforated aluminium panels, each measuring about 3 feet by 6 feet, supported by a mesh of steel cables.
	www.yourencyclopedia.net /Arecibo_radio_telescope.html (697 words)

	Arecibo radio telescope (Site not responding. Last check: 2007-10-19)
		Arecibo Observatory Site of the world's largest single-dish radio telescope, and recognized as one of the most importan centers for research in radio astronomy, planetary radar and terrestrial aeronomy.
		These telescopes are used, individually or together, to study objects in the Universe ranging from the remains of dead stars to entire galaxies.
		The solar telescope THÉMIS THÉMIS [Heliographic Telescope for the Study of the Magnetism and Instabilities on the Sun] is a new generation solar telescope built by the INSU/CNRS (France) and the CNR (Italy) agencies.
	www.serebella.com /encyclopedia/article-Arecibo_radio_telescope.html (418 words)

	Arecibo Radio Telescope Site. Arecibo Radio Telescope. (Site not responding. Last check: 2007-10-19)
		Refractor Telescopes (also known as dioptrics) are what the average person identifies with the word "telescope", a long, thin tube where light passes in a straight line from the front objective lens directly to the eyepiece at the opposite end of the tube.
		Newtonian Telescopes (also known as catoptrics) usually use a concave parabolic primary mirror to collect and focus incoming light onto a flat secondary (diagonal) mirror that in turn reflects the image out of an opening at the side of the main tube and into the eyepiece.
		The exit pupil of a telescope is the circular beam of light that leaves the eyepiece being used and is measured in mm.
	telescopes.t35.com /arecibo-radio-telescope.htm (571 words)

	All about the Arecibo Radio Telescope
		The Arecibo Radio Telescope is operated by Cornwell University for the National Science Foundation.
		It is the biggest single dish radio telescope in the world.
		The radio Arecibo telescope in 1989 was the first to directly image the asteroid, asteroid 4769 Castalia.
	www.best-telescope-guide.com /arecibo-radio-telescope.html (172 words)

	WTD. Arecibo Observatory
		As the site of the world's largest single-dish radio telescope, the Observatory is recognized as one of the most important national centers for research in radio astronomy, planetary radar and terrestrial aeronomy.
		For 37 years radio astronomers at the Arecibo Observatory have used this, the world's largest radio telescope, to fathom the radio signals of the cosmos.
		However, the assault on Arecibo comes on two fronts -- while electronic emissions encroach from the air, on the ground of this former 15 th -century Spanish colony in the Caribbean, the tropical forest forever attempts to consume the structure.
	www.whattodoinpr.com /observatory.html (1411 words)

	25th anniversary of Arecibo radio message to E.T.
		The message was sent during the dedication of a major upgrade to the Arecibo radio telescope on the afternoon of Nov. 16, 1974, and contained some very basic information about the human race.
		Arecibo Observatory is operated by the National Astronomy and Ionosphere Center, managed by Cornell for the National Science Foundation.
		If there is "anyone" in the target area when the signal arrives, they could detect it with a radio telescope of similar size and it would appear at 10 million times the intensity of the normal radio signals from our sun.
	www.news.cornell.edu /Chronicle/99/11.11.99/Arecibo_message.html (825 words)

	Arecibo Puerto Rico (Site not responding. Last check: 2007-10-19)
		Arecibo is a municipality in Puerto Rico, better known for its world-famous facility, the Arecibo radio telescope, where scientific studies have been carried out and Hollywood movies filmed (most recently Goldeneye and Contact).
		Arecibo is located on the north coast of the island, about 50 miles west of San Juan and the metropolitan area, or approximately a 1-hour trip by car.
		In sports, Arecibo used to have two professional franchises, the Lobos de Arecibo in baseball and the Capitanes de Arecibo in BSN basketball.
	www.wikiverse.org /arecibo-puerto-rico (360 words)

	UPR at Arecibo (Site not responding. Last check: 2007-10-19)
		Technical Data for the Arecibo Airglow and Optical Instrumentation Data information, and instrument documentation from the Arecibo optical facility.
		Optical SETI and the Arecibo Myth This paper justifies the logic of searching for ETI in the visible spectrum as oposed to radio.
		Diócesis de Arecibo Obispo, colegios, casas de retiro, datos históricos, patrona de la diócesis, tribunal diocesano y parroquias.
	www.serebella.com /encyclopedia/article-UPR_at_Arecibo.html (219 words)

	Arecibo, Puerto Rico (Site not responding. Last check: 2007-10-19)
		Arecibo is also known as "La Villa del Capitán Correa" in memory of a battle fought successfully on its shores by Captain Antonio Correa and a handful of soldiers to repel a British invasion by sea lead by Englishmen Admiral Whelstone in August 5, 1702.
		Arecibo is bordering the Atlantic Ocean, north of Utuado and Lares; east of Hatillo; and west of Barceloneta and Florida.
		Located 16 km (10 mi) south of Arecibo, Arecibo Observatory is a astronomical observatory, which is one of the world's most powerful radar-radio telescopes, and the largest single-unit radio telescope in the world.
	welcome.topuertorico.org /city/arecibo.shtml (663 words)

	Space Technology - Arecibo Radio/Radar Telescope
		Arecibo is also well suited to study the chemistry of star formation.
		The Arecibo Observatory is a radio/radar telescope that uses electromagnetic radiation, or radio waves, to study phenomena that occur as close as 3km (about 2 miles) above Earth in the upper atmosphere, or exotic cosmic objects many billions of light years away, at the edge of the known universe.
		The mirrors focus radio waves coming from distant objects in space or radar signals that are sent out into space and bounce back from the surfaces of the planets and other bodies in the solar system.
	www.space-technology.com /projects/Arecibo (703 words)

	The 305 meter telescope
		Those who see the Arecibo radio telescope for the first time are astounded by the enormousness of the reflecting surface, or radio mirror.
		By aiming a feed antenna at a certain point on the reflector, radio emissions originating from a very small area of the sky in line with the feed antenna will be focused on the feed antenna.
		Other radio telescopes may require several hours observing a given radio source to collect enough energy for analysis whereas at Arecibo this may require just a few minutes of observation.
	www.naic.edu /public/the_telescope.htm (669 words)

	Arecibo Radio/Radar Telescope - Aerospace Technology
		Arecibo is also well suited to study the chemistry of star formation.
		The Arecibo Observatory is a radio/radar telescope that uses electromagnetic radiation, or radio waves, to study phenomena that occur as close as 3km (about 2 miles) above Earth in the upper atmosphere, or exotic cosmic objects many billions of light years away, at the edge of the known universe.
		The mirrors focus radio waves coming from distant objects in space or radar signals that are sent out into space and bounce back from the surfaces of the planets and other bodies in the solar system.
	www.aerospace-technology.com /projects/Arecibo (718 words)

	Arecibo Radio Telescope (Site not responding. Last check: 2007-10-19)
		Arecibo radio telescope is currently the largest single-dish telescope in the world.
		Science Foundation, is the largest and most sensitive single dish radio telescope in the world...
		For almost 40 years radio astronomers at the Arecibo Observatory have used this, the world's largest radio telescope, to fathom the sounds of the...
	www.telescopes-and-binoculars.info /optics/arecibo-radio-telescope.html (145 words)

	PUERTO RICO HERALD: Scientists To Map Known Universe Using Arecibo Radio Telescope (Site not responding. Last check: 2007-10-19)
		ARECIBO (AP) - The world's most sensitive listening device is about to hear more from the universe.
		The radio telescope at Arecibo Observatory, powerful enough to hear a phone conversation on Venus or planets forming several billion light years away, is being upgraded with six more radio receivers to expand the area of space it can explore at any time, scientists said Monday.
		Arecibo expects to find thousands of new pulsars, supernova, fl holes and planets, "and some of those are going to be very interesting."
	www.puertorico-herald.org /issues/2003/vol7n37/ScientistsMap-en.shtml (652 words)

	Noise Contribution Analysis for the Arecibo Gregorian Radio Telescope (Site not responding. Last check: 2007-10-19)
		In a radio telescope, minimizing any contribution to the system noise temperature is of great importance when detecting faint signals in the sky, since the integration time to obtain a given signal to noise ratio varies as the square of the system noise temperature.
		The Arecibo radio telescope, with its 305-meter spherical reflector, has the largest collecting area of any radio or radar antenna on the Earth, (see Figure 1-1).
		An example of a typical ray trace scan of the Arecibo radio telescope is shown in Figure 2-1, indicating the main components of the Gregorian corrector as well as the main ray trajectories.
	www.ecs.umass.edu /ece/allerton/papers1999/22 (2550 words)

	SPACE.com -- Arecibo's Internet2 Connection Gives Researchers Greater Access
		In the past, using the Arecibo telescope, the largest single-dish radio telescope in the world meant researchers had to make the long trek into the jungles of Puerto Rico.
		As with most telescopes, Arecibo is located as far as possible from civilization in order to reduce the electromagnetic interference and "pollution" leaked out by large communities.
		But until the telescope's Internet upgrade the only way to access the large amounts of data collected in a reasonable time span was by being on site.
	space.com /businesstechnology/technology/arecibo_internet2_030115.html (903 words)

	> Radio telescope abcworld.net (Site not responding. Last check: 2007-10-19)
		The largest individual radio telescope is the RATAN-600 (Russia) with 576 metre diameter of circular antenna (RATAN-600 description).
		The largest radio telescope in Europe is the 100 metre diameter antenna in Effelsberg, Germany, which also was the largest fully steerable telecope for 30 years until the Green Bank Telescope was opened in 2000.
		The best-known (although non-steerable) radio telescope probably is the Arecibo radio telescope located in Arecibo, Puerto Rico.
	www.abcworld.net /Radio_telescope.html (774 words)

	SPACE.com -- Arecibo: Celestial Eavesdropper
		Their resulting emissions of strong, pulsed radio waves are due to the spinning of the remaining star.
		Radio astronomy was born early in the 20th century when scientists tried to understand why hiss-like static was constantly plaguing their first transatlantic radio transmissions.
		Arecibo Observatory is operated by Cornell University in cooperation with the National Science Foundation (NSF) which provides most of its $10 million annual budget.
	www.space.com /scienceastronomy/astronomy/arecibo_profile_000508.html (2095 words)

	Cornell News: Arecibo finds asteroid Hermes
		ARECIBO, P.R. -- An asteroid that has eluded astronomers for decades turns out to be an unusual pair of objects traveling together in space, a planetary scientist using the National Science Foundation's (NSF) Arecibo Observatory radio telescope and his colleagues report.
		Margot and colleagues are analyzing new radar measurements from the Arecibo Observatory, Puerto Rico, the world's largest single-dish radio telescope, operated by the National Astronomy and Ionosphere Center (NAIC) at Cornell University, Ithaca, N.Y., for the NSF.
		The astronomers are scheduled to obtain additional measurements using the Arecibo telescope this weekend (Oct. 25-26).
	www.news.cornell.edu /releases/Oct03/Arecibo.asteroid.deb.html (799 words)

	arecibo radio telescope
		Explanation: The Arecibo radio telescope is currently the largest single-dish telescope in the world...
		The largest radio telescope in the world and the one used for the Berkeley SETI search is the Arecibo Radio Telescope, in northwestern Puerto Rico, near...
		The Arecibo Observatory is the largest radio telescope in the world, built into the landscape, located in Arecibo, Puerto Rico...
	www.telescopes-guide.com /arecibo-radio-telescope (819 words)

	SETI@home Update, August 14, 2006 - What We Do \| The Planetary Society
		In seven intense days spent at the radio telescope Chief scientist Dan Werthimer and his colleagues completely overhauled the way SETI data is gathered at Arecibo, and ensured that SETI@home will henceforth enjoy the benefits of gathering data with the most advanced equipment anywhere in the world.
		It is an unavoidable fact that the radio frequencies in which radio telescopes listen for faint signals from the sky are flooded with not-at-all faint man-made radio signals that originate here on Earth.
		It is, for instance, constantly monitoring the automated ongoing transmissions at Arecibo, reporting which of the telescope's receivers is currently at the focal point, the frequency of the current observations, and where the telescope is pointing.
	www.planetary.org /programs/projects/setiathome/setiathome_20060814.html (1952 words)

	Encyclopedia: Arecibo radio telescope (Site not responding. Last check: 2007-10-19)
		In August of 1989, the observatory directly imaged an asteroid for the first time in history: asteroid 4769 Castalia.
		The Arecibo Observatory was also featured in the movie Contact.
		The National Astronomy and Ionosphere Center's (NAIC) Arecibo Observatory in Puerto Rico (http://www.naic.edu/about/history/daltschuler_3.pdf) by Daniel R. Altschuler
	www.nationmaster.com /encyclopedia/Arecibo-radio-telescope (1004 words)

	Arecibo Radiotelescope Made Incredibly More Sensitive
		Arecibo Radiotelescope Made Incredibly More Sensitive (April 22, 2004) -- The Arecibo Observatory telescope, the largest and most sensitive single dish radio telescope in the world, is about to get a good deal more...
		The complex new addition to the Arecibo telescope was hauled 150 meters (492 feet) above the telescope's 1,000-foot-diameter (305 meters) reflector dish starting in the early morning hours.
		Radio telescopes traditionally have been limited to seeing just one spot -- a single pixel -- on the sky at once.
	www.sciencedaily.com /releases/2004/04/040421231629.htm (686 words)

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