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Merlin
The Multi-Element Radio Linked Interferometer Network (MERLIN) is an interferometer array of radio telescopes spread across England. The array is run from Jodrell Bank Observatory in Cheshire by the University of Manchester on behalf of UK Research and Innovation. The array consists of up to seven radio telescopes and includes the Lovell Telescope at Jodrell Bank, Mark II, Cambridge, Defford in Worcestershire, Knockin in Shropshire, and Darnhall and Pickmere (previously known as Tabley) in Cheshire. The longest baseline is therefore 217 km and MERLIN can operate at frequencies between 151 MHz and 24 GHz. At a wavelength of 6 cm (5 GHz frequency), MERLIN has a resolution of 40 milliarcseconds which is comparable to that of the HST at optical wavelengths. Some of the telescopes are occasionally used for European VLBI Network (EVN) and Very Long Baseline Interferometry (VLBI) observations in order to create an interferometer with even larger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jodrell Bank Observatory
Jodrell Bank Observatory ( ) in Cheshire, England hosts a number of radio telescopes as part of the Jodrell Bank Centre for Astrophysics at the University of Manchester. The observatory was established in 1945 by Bernard Lovell, a radio astronomer at the university, to investigate cosmic rays after his work on radar in the Second World War. It has since played an important role in the research of meteoroids, quasars, pulsars, masers, and gravitational lenses, and was heavily involved with the tracking of space probes at the start of the Space Age. The main telescope at the observatory is the Lovell Telescope. Its diameter of makes it the third largest steerable radio telescope in the world. There are three other active telescopes at the observatory; the Mark II and and 7 m diameter radio telescopes. Jodrell Bank Observatory is the base of the Multi-Element Radio Linked Interferometer Network (MERLIN), a National Facility run by the University of Manchester o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It shares Anglo-Scottish border, a land border with Scotland to the north and England–Wales border, another land border with Wales to the west, and is otherwise surrounded by the North Sea to the east, the English Channel to the south, the Celtic Sea to the south-west, and the Irish Sea to the west. Continental Europe lies to the south-east, and Ireland to the west. At the 2021 United Kingdom census, 2021 census, the population was 56,490,048. London is both List of urban areas in the United Kingdom, the largest city and the Capital city, capital. The area now called England was first inhabited by modern humans during the Upper Paleolithic. It takes its name from the Angles (tribe), Angles, a Germanic peoples, Germanic tribe who settled du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One-Mile Telescope
The One-Mile Telescope at the Mullard Radio Astronomy Observatory (MRAO), Cambridge, UK is an array of radio telescopes (two fixed and one moveable, fully steerable parabolic reflectors operating simultaneously at 1407 MHz and 408 MHz)The operation of the Cambridge one-mile telescope , Vol. 134, p.87 designed to perform aperture synthesis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defford
Defford is a small village in the county of Worcestershire, England, located between the towns of Pershore and Upton-upon-Severn. It was once part of the Royal forest of Horewell. The woodlands were mostly removed around the time of the Civil War.* 'Parishes: Pershore, St Andrew with Defford and Wick', in A History of the County of Worcester: Volume 4, ed. William Page and J W Willis-Bund (London, 1924), pp. 163–177 http://www.british-history.ac.uk/vch/worcs/vol4/pp163-177 ccessed 30 August 2015/ref> Defford also has a primary school, Defford cum Besford First School, and three pubs. Defford is home to one of the radio telescopes that make up the Jodrell Bank MERLIN (Multi-Element Radio Linked Interferometer Network) radio telescope A radio telescope is a specialized antenna (radio), antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument used in radio astronomy, which stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hubble Space Telescope
The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the Orbiting Solar Observatory, first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy. The Hubble Space Telescope is named after astronomer Edwin Hubble and is one of NASA's Great Observatories program, Great Observatories. The Space Telescope Science Institute (STScI) selects Hubble's targets and processes the resulting data, while the Goddard Space Flight Center (GSFC) controls the spacecraft. Hubble features a mirror, and its five main instruments observe in the ultraviolet, visible spectrum, visible, and near-infrared regions of the electromagnetic spectrum. Hubble's orbit outside the distortion of atmosphere of Earth, Earth's atmosphere allows it to capture extremely high-resolution images with substantially lower background lig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or Cycle per second, cycle) per second. The hertz is an SI derived unit whose formal expression in terms of SI base units is 1/s or s−1, meaning that one hertz is one per second or the Inverse second, reciprocal of one second. It is used only in the case of periodic events. It is named after Heinrich Hertz, Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. For high frequencies, the unit is commonly expressed in metric prefix, multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Very Large Array
The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory in the southwestern United States built in the 1970s. It lies in central New Mexico on the Plains of San Agustin, between the towns of Magdalena, New Mexico, Magdalena and Datil, New Mexico, Datil, approximately west of Socorro, New Mexico, Socorro. The VLA comprises twenty-eight 25-meter radio telescopes (twenty-seven of which are operational while one is always rotating through maintenance) deployed in a Y-shaped array and all the equipment, instrumentation, and computing power to function as an astronomical interferometer, interferometer. Each of the massive telescopes is mounted on double parallel railroad tracks, so the radius and density of the array can be transformed to adjust the balance between its angular resolution and its surface brightness sensitivity. Astronomers using the VLA have made key observations of black holes and protoplanetary disks around Stellar age estimati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E-Systems
Raytheon Intelligence, Information, and Services (RIIS or IIS) is a business unit of Raytheon Company headquartered in Dulles, Virginia. IIS specializes in intelligence, surveillance, and reconnaissance, advanced cybersecurity services; weather and environmental services, and information-based services for homeland security. The company also provides training, logistics, engineering, product support, and operational support services and solutions for mission support, homeland security, space, civil aviation, counter-proliferation, and counter-terrorism markets. History Originally founded as LTV Electro Systems in the mid-1960s, the company changed its name to E-Systems in the early 1970s. In 1995, Raytheon Company acquired E-Systems, Inc., a Texas-based company that designed, developed, produced, and serviced high-technology systems including surveillance, verification, and aircraft ground-land navigation equipment. The company also developed electronics programs and systems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark III (radio Telescope)
The Mark III was a portable and fully steerable radio telescope located at Wardle, near Nantwich, Cheshire in the north-west of England. Constructed in 1966, it was remotely controlled from Jodrell Bank Observatory, and was mainly used as part of the MERLIN radio telescope network. It was designed by Charles Husband at the instigation of Bernard Lovell.Lovell, ''Jodrell Bank Telescopes'', p. 12 Technical specifications Funding for the telescope was obtained in 1963 from the DSIR. The telescope was designed by Husband and Co. consulting engineers, and was constructed by Fairey Engineering. It started observations in July 1967. The telescope could be controlled either locally, or by remote control over UHF and microwave links from Jodrell Bank Observatory (normally the latter).Palmer and Rowson (1968) Similar to the Mark II, it had an elliptical dish with a major axis of 125 ft/38.1m and a minor axis of 83 ft 4 in/25.4m. Unlike the Mark II, however, the dish is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knockin Radio Telescope
Knockin is a village and civil parish in north-west Shropshire, England. It is located on the B4396 road, around south-east of the town of Oswestry, and from the county town of Shrewsbury. History The former name of Knockin was Cnukyn. The village comprises mainly historic detached buildings in a rural setting. The Earl of Bradford owned much of Knockin until it was sold off in lots to meet other financial demands. The Earl still owns the cricket pitch and other small pockets of land in the area. The local public house is called the Bradford Arms and displays the Earl's Bridgeman family coat of arms. The pub also has a clock with three faces, hung outside above the main entrance. The motto displayed on the sign is that of the Bridgeman family "Nec temere nec timide" (Neither rashly nor timidly). The village was struck by an F1/T2 tornado on 23 November 1981, as part of the record-breaking nationwide tornado outbreak on that day. The tornado later moved over Oswestry, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angular Resolution
Angular resolution describes the ability of any image-forming device such as an Optical telescope, optical or radio telescope, a microscope, a camera, or an Human eye, eye, to distinguish small details of an object, thereby making it a major determinant of image resolution. It is used in optics applied to light waves, in antenna (radio), antenna theory applied to radio waves, and in acoustics applied to sound waves. The colloquial use of the term "resolution" sometimes causes confusion; when an optical system is said to have a high resolution or high angular resolution, it means that the perceived distance, or actual angular distance, between resolved neighboring objects is small. The value that quantifies this property, ''θ,'' which is given by the Rayleigh criterion, is low for a system with a high resolution. The closely related term spatial resolution refers to the precision of a measurement with respect to space, which is directly connected to angular resolution in imaging ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
