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Topic: Radiotelescope

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Aperture synthesis

	[No title]
		The antenna of this radiotelescope is an equidistant array of 16384 thin wave dipoles united by open two-wire feed lines.
		The further renovation of the radiotelescope BSA FIAN is supposed to ¥ increase of sensitivity by 1.5 times ¥ create second independently controlled pattern ¥ create of a long tracking system The increase of sensitivity is supposed to be achieved by including group amplifiers (1024 units).
		BSA is used for studies of pulsar radio emission, for investigation of the whole series dynamic processes in the near-Sun and interplanetary plasma, for the analysis of the compact radio sources structure in the meter range of wavelengths.
	radio.astro.gla.ac.uk /exoplanets/team/bsa-dkr.doc (918 words)

	History of the Ohio State University Big Ear Radiotelescope
		The Ohio State Radiotelescope is larger than three football fields in size, and equivalent in sensitivity to a circular dish 175 feet in diameter.
		The beam of the telescope is elliptical, being 40 minutes of arc in the declination (vertical) direction, and 8 minutes of arc in the right ascension (horizontal) direction.
		Of course, there are always many distant stars and galaxies in the beam of a radiotelescope all the time, but that is not significant.
	www.setileague.org /articles/bigear.htm (2171 words)

	Nightshade
		But later that night, the scientists at the local radiotelescope are baffled by a sudden energy surge from an unknown source, which floods their instruments and blots out the signals they were monitoring from a nova in the vicinity of Bellatrix.
		Seeking excitement, Ace hides in the back seat of Vijay’s car and is taken to the radiotelescope, and while exploring she finds a guard’s rapidly decomposing body near a hole in the fence.
		The Doctor returns to the radiotelescope, leaving Ace at the monastery, but Hawthorne scoffs at the Doctor’s claims, accuses Holly and Vijay of taking psychedelic drugs, and storms off to his room -- where he is attacked and consumed by a Tar Baby, the embodiment of his childhood fears.
	www.drwhoguide.com /who_na08.htm (2182 words)

	Scope collapses in mysterious incident - Green Bank, W.Va, 1988
		The 26-year-old instrument, an antenna dish the size of a football field in diameter, gave way late Tuesday, while a staffer was using it, said George Seielstad, assistant director for Green Bank operations at the National Radio Astronomy Observatory.
		Radiotelescopes are an important complement to optical (light-gathering) telescopes and other astronomical tools, Fraknoi said.
		KEY U.S. "A 300-foot radiotelescope, the first of its kind and a key tool in pioneering the modern study of the universe, crashed to the ground at the National Radio Astronomy Observatory, officials said Wednesday.
	quantum_mars.tripod.com /articles.htm (1268 words)

	Study of Modelling Methods for Large Reflector Antennas
		However, the problems associated with the applicability of near-field metrology for the determination of the radiation pattern of a radiotelescope are due to the large amounts of near-field data required as well as the practical problems faced in order to acquire these data in a reliable way.
		The latter two types are very useful for radiotelescope holography as they allow the pattern measurement to be performed at elevation ranges similar to those used in the actual operation of the radiotelescope.
		Once holographic information for the radiotelescope is retrieved it is possible to provide analytical expressions for the reflector surface using spline interpolation functions, zernike polynomials etc. This is primarily the value of holography as a pattern prediction tool.
	www.ofcom.org.uk /static/archive/ra/topics/research/topics/archive/antenna/antennas.htm (13255 words)

	colomer
		The New 40 Meter Radiotelescope of OAN at Yebes
		The new radiotelescope will be equiped with state-of-the-art receivers in the 2 to 115 GHz range (including the geodetic S/X bands), and will join the astronomical and geodetic VLBI networks (EVN and IVS) from the start of its operations.
		The 40 meter radiotelescope will operate in the 13 cm (2.3 Ghz) to 2.6 mm (115 Ghz) range, both as a single antenna and as one element in a VLBI array for astronomical and geodetic studies.
	europa.ieec.fcr.es /hosted/15wmevga/proceedings/colomer/colomer.html (365 words)

	colomer
		The New 40 Meter Radiotelescope of OAN at Yebes
		The new radiotelescope will be equiped with state-of-the-art receivers in the 2 to 115 GHz range (including the geodetic S/X bands), and will join the astronomical and geodetic VLBI networks (EVN and IVS) from the start of its operations.
		The 40 meter radiotelescope will operate in the 13 cm (2.3 Ghz) to 2.6 mm (115 Ghz) range, both as a single antenna and as one element in a VLBI array for astronomical and geodetic studies.
	www.ieec.fcr.es /hosted/15wmevga/proceedings/colomer/colomer.html (365 words)

	Radioastronomical station Simeiz of Laboratory of Radioastronomy of Crimean Astrophysical Observatory, Ukraine (Site not responding. Last check: 2007-10-09)
		The Department of Radioastronomy with its 22-m radio telescope is located at the foot of mount Koshka (translation from the Ukraine language is "The Cat") at the shore of Black Sea in 20 kilometers west from city Yalta.
		Radiotelescope has a feed horn which allows to observe at the wavelength 13 and 3.6 cm simultaneously.
		The radiotelescope operation is supported by a control system, which consists of two encoders with accuracy of positioning 3 arcsec (rms), computer IBM-486, CAMAC, quartz time standard, electric engines and other equipment and software.
	giub.geod.uni-bonn.de /vlbi/stations/rt22.html (431 words)

	Valuworld.com Ohio (Site not responding. Last check: 2007-10-09)
		Despite the extreme difficulty in raising money for the search, these dedicated scientists and their colleagues have worked year after year, looking for that beep that might be the first proof of an alien civilization.
		After the Ohio State SETI system had been running for a number of years, the land on which the radiotelescope sat was sold to a golf course.
		But after a public outcry heard around the world, a compromise was reached, allowing the radiotelescope to continue its observations.
	valuworld.com /usa/oh (322 words)

	Information for Students
		The screening at the radiotelescope for signals might miss unusual signals not programmed into the computerized search (the initial data collection and screening is accomplished with CoolEdit 2000 and the Spectral View function, and a cluster of computers running a version of SETIEasy).
		ASRG members record signals from the remote radiotelescope on disks and transport the data to the lab.
		The ASRG has tools to examine the data more closely, and can move the radiotelescope to track the signal or establish its terrestrial location if it is an interference.
	kerouac.pharm.uky.edu /seti/volunteers.html (1399 words)

	Valuworld.com Ohio (Site not responding. Last check: 2007-10-09)
		Despite the extreme difficulty in raising money for the search, these dedicated scientists and their colleagues have worked year after year, looking for that beep that might be the first proof of an alien civilization.
		After the Ohio State SETI system had been running for a number of years, the land on which the radiotelescope sat was sold to a golf course.
		But after a public outcry heard around the world, a compromise was reached, allowing the radiotelescope to continue its observations.
	www.valuworld.com /usa/oh (322 words)

	nsyebes
		The 14 meter radiotelescope at Yebes participates regularly in the geodetic VLBI campaigns (EUROPE and CORE).
		This facility is a network station in IVS, and participates regularly in the geodetic VLBI campaigns to study the tectonic plate motions in Europe (project EUROPE), Earth rotation, and pole motion (project CORE).
		The institute is currently involved in the construction of a new 40 meter radiotelescope that will be available for geodetic VLBI observations in the next few years.
	ivs.nict.go.jp /mirror/publications/ar1999/nsyebes (578 words)

	Radiotelescope Antenna (Site not responding. Last check: 2007-10-09)
		The antenna is the most obvious part of a radiotelescope.
		It is analogous to the lens of an optical telescope.
		The antenna is adjusted in elevation to a given angle and the cosmic radio source allowed to pass through the antenna beam as the Earth rotates.
	www.radiosky.com /simpant.html (287 words)

	THE UTR-2 SURVEYS (Site not responding. Last check: 2007-10-09)
		This paper is a continuation of the series of publications dedicated to the Northern sky survey with the UTR-2 radiotelescope in the fre- quency range 10 to 25 MHz.
		Thus, a trial source is placed at the nodes of a two-dimensional grid (with size of the cell 0.06d in right ascension (K) and 0.05d in declination (d)).
		In each node the optimum amplitude of discrete sources and its error are calculated using the data of all five radiotelescope beams according to the least squares method.
	cats.sao.ru /doc/UTR13.html (1787 words)

	Eclipse 2002 (Site not responding. Last check: 2007-10-09)
		The School of Mathematics and Physics at the University of Tasmania operates a 30m radiotelescope near Ceduna and we are planning a number of observations to look at the high-frequency radio emission from the solar corona during the eclipse.
		The radiotelescope is approximately 30 km from the town of Ceduna, so is it in the path of totality?
		Lots of people have been asking us what we'll be doing with the radiotelescope during the eclipse.
	www-ra.phys.utas.edu.au /eclipse (534 words)

	Science!
		The image was made on 21 March 1996, with the NRAO 12m radiotelescope atop Kitt Peak, Arizona, by Jeff Mangum using the newly implemented `on-the-fly' mapping technique.
		The image was made with the NRAO 12m radiotelescope in September, 1995 using the newly implemented `on-the-fly' mapping technique.
		Here the interstellar gas glows with emission from the carbon monoxide molecules, which, mixed with dust, completely obscured the star-forming interior of the cloud in the previous image.
	www.cv.nrao.edu /~awootten/research.html (1419 words)

	Radiotelescope Recording Devices
		To be of any value, the output of a radiotelescope must be recorded.
		In order to make the transition from a continuously varying analog voltage (the output of the radiotelescope) to digital information which the computer can process a special device is required called an analog to digital converter.
		Sound cards are great for recording sounds in these specialized cases, but remember, the output of the generalized radiotelescope in our example is not sound, but a slowly varying voltage which corresponds to the amount of energy or antenna is picking up from the region of sky towards which it is pointed.
	www.radiosky.com /simprec.html (490 words)

	Hubble is history - NASA planning telescope on the moon - Newlaunches.com
		The most powerful radiotelescope yet devised is to be built on the Moon, under plans being put together by Nasa for its 2018 lunar mission.
		A radiotelescope on the Moon would offer astronomers and physicists an unrivalled opportunity to see farther into the cosmos than ever before and in more detail.
		It could be a wonderful place to have a radiotelescope.” said Ian Morison a radio astronomer.
	www.newlaunches.com /archives/hubble_is_history_nasa_planning_telescope_on_the_moon.php (207 words)

	ARRLWeb: John D. Kraus, W8JK, SK
		University of Michigan in the 1930s, and, while working in the school's physics department, he helped construct and did research on the university's cyclotron.
		He served as a professor of electrical engineering and astronomy at OSU, where he founded and directed the OSU Radio Observatory (OSURO)--designing and overseeing construction of the "Big Ear" radiotelescope on the land owned by Ohio Wesleyan University in Delaware.
		Other honors include the OSU Joseph Sullivant Medal--one of the university's highest awards, the Outstanding Achievement Award of the University of Michigan as well as the Centennial Medal and the IEEE Edison Medal "for a sustained career as an innovator, discoverer and educator in the fields of antennas and radio astronomy.
	www.arrl.org /news/stories/2004/07/21/1?nc=1 (979 words)

	NASA Tech Briefs: Program computes pointing corrections for a radiotelescope
		TLC is a computer program that determines corrections for radiotelescope-- pointing errors associated with tilts and elastic deformations.
		These errors occur because for rotation in azimuth, a radiotelescope is mounted on wheels that move on a circular track that deviates from perfect flatness.
		The field data in question are readouts from four inclinometers, the relative positions of the inclinometers, and readouts from an azimuth-angle encoder.
	www.findarticles.com /p/articles/mi_qa3957/is_200201/ai_n9063834 (258 words)

	ASRG and the Search for Extraterrestrial Intelligence
		The intelligent origin of microwave signals is readily established by spectroscopy through the sharply defined bandwidth in which signals will likely occur, the Doppler shift, the fact that the signals will likely be highly polarized, and the fact that they will likely exhibit a well-defined and "unnatural" modulation.
		More information about the microwave radiotelescope can be found here.
		To encourage participation in the SETI effort, data from the radiotelescope can be downloaded and analyzed on your computers using different techniques.
	kerouac.pharm.uky.edu /ASRG/CURRENT/J94/argus.htm (566 words)

	Swinburne: makes the jump into hyperspace with Apple Xserve RAID.
		Despite having some of the world’s best radiotelescope facilities and a heavyweight supercomputer at his disposal, the Melbourne-based academic was finding his research held back by one fundamental problem: lack of disk space.
		The primary purpose of the Supercluster is to provide the computing power necessary to process and model the vast amounts of astrophysical data collected from radiotelescopes across Australia, including those at Parkes and Narrabri.
		Much of the raw data for their astrophysics research is collected via the radiotelescope facilities at Parkes.
	www.apple.com /au/pr/casestudies/2004/04/swinburne (1158 words)

	Hanover College: RadioTelescope
		The RadioTelescope Project began in the Fall Term 99'.
		Hanover College was then given an 18 ft. satelite dish as long as the college took responsibility of transporting the dish.
		High quality signal cable will need to be installed from the roof to the second floor Physics Support Lab, This step has been a hurdle due to concerns of aesthetics and (obviously) precautions not to damage the new multi-million dollar Science Center.
	www.hanover.edu /physics/OLDradioscope.htm (550 words)

	The Wiruna Radio Telescope Project (Site not responding. Last check: 2007-10-09)
		The The Wiruna Radio Telescope Project is a project being undertaken by members for members, to help introduce members to Radio Astronomy.
		The Fleurs aperture synthesis radiotelescope comprised a number of dishes of "about sixteen feet" diameter arranged in the arms of a cross.
		Radio photons reflected from the meshes onto the prime focus dipoles and turned into electrical energy, but there was no-one to listen.
	www.asnsw.com /wiruna/rt.htm (512 words)

	Newswise
		The Arecibo Observatory radiotelescope is about to get a good deal more sensitive.
		On Wednesday, April 21, 2004, the telescope got a new "eye on the sky" that will turn the huge dish into the equivalent of a seven-pixel radio camera.
		Some might not be part of the Cornell University community, and Cornell has no control over their content or availability.
	www.newswise.com /articles/view/504448 (531 words)

	Moon-based radiotelescope planned
		Then you might be able to put down a permanent lunar base and implement the infrastructure needed to construct the radiotelescope.
		By the time we get around to building all of this fancy infrastructure, rail guns and stuff like that may very well be common place.
		You and I will never see space because the government's involvement and over regulation and control will continue to keep most industries out of space and keep prices artificially high.
	setiathome.ssl.berkeley.edu /forum_thread.php?id=29217&nowrap=true (2797 words)

	GK Workshop - W.K. Huchtmeier
		Observations were performed with the Effelsberg 100 m radiotelescope, the Nançay radiotelescope, and the compact array of the Australia telescope.
		The aim of this project is to improve our knowledge of the local luminosity function of galaxies and to find nearby dwarf galaxies for detailed studies.
		profiles observed with the 100 m radiotelescope in Fig. 1.
	www.astro.uni-bonn.de /~webgk/ws98/huc_t.html (824 words)

	NASA Tech Briefs - NPO21135
		These errors occur because for rotation in azimuth, a radiotelescope is mounted on wheels that move on a circular track that deviates from perfect flatness.
		TLC processes radiotelescope field data through smoothing, filtering, segment-fitting, trend-removal, Fourier-transform, and high-pass- filtering algorithms to generate a lookup table that contains the pointing corrections.
		The field data in question are readouts from four inclinometers, the relative positions of the inclinometers, and readouts from an azimuth-angle encoder.
	www.techbriefs.com /index.php?option=com_staticxt&staticfile=Briefs/Jan02/NPO21135.html (279 words)

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