Radio telescopes can also be used to observe neutral hydrogen ( via 21 cm radiation ), including, potentially, the non-ionized matter in the early universe that later collapsed to form galaxies.

Radio telescopes can also scan over the frequencies from one point in the map, recording the intensities of each type of molecule.

Radio and submillimeter telescopes use much larger dishes or antennae, which do not have to be made as precisely as the mirrors used in optical telescopes.

Radio telescopes are typically large parabolic (" dish ") antennas used singly or in an array.

Radio telescopes usually do not have domes.

Radio astronomy is conducted using large radio antennas referred to as radio telescopes, that are either used singularly, or with multiple linked telescopes utilizing the techniques of radio interferometry and aperture synthesis.

Radio telescopes may need to be extremely large in order to receive signals with high signal-to-noise ratio.

Modern Radio interferometers consist of widely separated radio telescopes observing the same object that are connected together using coaxial cable, waveguide, optical fiber, or other type of transmission line.

* Radio Astronomy ( under Martin Ryle and Antony Hewish ), with the Radio Astronomy Group's telescopes being based at Mullard Radio Astronomy Observatory.

In addition, Side looking radars, High-powered Optical Satellites, and sky-scanning, high-Aperature, high sensitivity Radars such as Radio telescopes, would all be able to narrow down the location of a Stealth aircraft under certain parameters.

The Jodrell Bank Observatory ( originally the Jodrell Bank Experimental Station, then the Nuffield Radio Astronomy Laboratories from 1966 to 1999 ; ) is a British observatory that hosts a number of radio telescopes, and is part of the Jodrell Bank Centre for Astrophysics at the University of Manchester.

The Multi-Element Radio Linked Interferometer Network ( MERLIN ) is an array of radio telescopes spread across England and the Welsh borders.

Category: Radio telescopes

Category: Radio telescopes

Radio telescopes often have a prime focus design.

Category: Radio telescopes

Fixed telescope mounts are entirely fixed in one position, such as Zenith telescopes that point only straight up and the National Radio Astronomy Observatory's Green Bank fixed radio ' horn ' built to observe Cygnus X-1.

Taylor immediately went to the National Radio Astronomy Observatory's telescopes in Green Bank, West Virginia, and participated in the discovery of the first pulsars discovered outside Cambridge.

See also Radio telescopes.

Category: Radio telescopes

In late 2004, Radio Televisión Nacional de Colombia ( RTVC ) replaced the liquidated Inravisión ( Instituto Nacional de Radio y Televisión ) as the government-run radio and television broadcasting service, which oversees three national television stations and five radio companies ( which operate about a dozen principal networks ).

Starting 2003, Nile Radio Production a private company was given license to operate two radio stations, Nile FM and Nogoom FM.

KTV Ltd. also operate two relay stations, KTV Radio Nova ( a rebroadcast of BBC World Service ) and KTV Radio Nova Saint FM ( a rebroadcast of Saint FM ).

Radio stations operate in the capital, with the most notable being Radio Tirana, commercial Top Albania Radio and Plus 2 Radio.

Belgian pirate radio station Radio Uylenspiegel is knocked off the airwaves, never to operate again.

Additionally, the Radio One stations in St. John ’ s and Vancouver operate shortwave relay transmitters, broadcasting at 6160 kHz.

A CB ( citizens ' band ) radio or Personal Radio Service Device under Class Assignment does not need an individual license to operate in Malaysia if it adheres to the rules of the Warta Kerajaan Malaysia, Communication and Multimedia Act 1998 ( Act 588 ), Notification of Issuance Of Class Assignment, P. U. ( B ) 416 Jil.

Due to the high demand for frequencies in Europe, many countries operate single frequency networks ; in Britain, BBC Radio Five Live broadcasts from various transmitters on either 693 or 909 kHz.

As of 8 December 2006, a licence is no longer required to own or operate a CB Radio providing it meets the original legal specifications for UK usage or is CE stamped: FM only, 4 watts power output and operating on either or both UK and CEPT ( EU ) 27 MHz bands.

Radio control systems of this era were generally electromechanical in nature, using small metal " fingers " or " reeds " with different resonant frequencies each of which would operate one of a number of different relays when a particular frequency was received.

When the station goes off-air, all broadcasts cease as the station does not simulcast any other broadcast, even the internet livestream stops ; this is unusual on the BBC Radio network as nearly all radio stations now operate 24 hours a day or simulcast with another service-Radio 4 simulcasts with the BBC World Service and BBC Local Radio stations broadcast 5 Live when not on air.

Daily Mail and General Trust operate the DMG Radio Australia commercial radio networks in metropolitan and regional areas of Australia.

Together, the Five Colleges operate WFCR, " Five College Radio ", an NPR affiliate operating at 88. 5 MHz in the FM band.

The Rockwell Modular Digital Radio ( MDR ) was one I and Q decoding set, which in 1997 could operate in frame-at-a-time mode with a PC or in realtime with the Fast IQ Processor ( FIQP ).

Some wanted the new channel to be private and funded by advertising, but it was decided that Sveriges Radio would operate the second channel and that it would be funded by the license fee as well.

Amateur Radio licensees are not allowed to operate unattended radio beacon transmitters within 50km of the Waddington airfield, centred on Ordnance Survey Grid Reference SK 985640.

These four countries jointly helped develop the 406 MHz Emergency Position-Indicating Radio Beacon ( EPIRB ), an element of the GMDSS designed to operate with Cospas-Sarsat system.

Although translators are prohibited from airing their own programming, both stations operate through a loophole which allows them to do so if it is also simulcast on the primary station's HD Radio channels.

The Istiqlal was still firmly united in 1957, but the P.D.I. ( Parti Democratique de l'Independance ), the most important minor party at the time, objected to the Istiqlal's predominance in the civil service and influence in Radio Maroc.

Radio, however, so increased the interest of women in the game that it was hardly necessary even to have `` Ladies' Days '' any longer to enable men to get to the ball park without interference at home.

*" The Library at Ninevah ", In our Time — BBC Radio 4

In June 2009, the US National Public Radio ( NPR ), relying on information obtained from the CIA World Factbook, put the number of Israeli Jews living in settlements in the West Bank and Israeli-annexed East Jerusalem at 250, 000.

In addition to managing JPL, Caltech also operates the Palomar Observatory in San Diego County, the Owens Valley Radio Observatory in Bishop, California, the Submillimeter Observatory and W. M. Keck Observatory at the Mauna Kea Observatory, the Laser Interferometer Gravitational-Wave Observatory at Livingston, Louisiana and Richland, Washington, and Kerckhoff Marine Laboratory in Corona del Mar, California.

Radio observations revealed a sharp increase in continuum emission at a wavelength of 21 cm after the largest impacts, which peaked at 120 % of the normal emission from the planet.

From 1972 to 1981, Sagan was the Associate Director of the Center for Radio Physics and Space Research at Cornell.

" That same year, then-U. S. President Gerald Ford acknowledged the stature of the comic strip, telling the Radio and Television Correspondents ’ Association at their annual dinner, " There are only three major vehicles to keep us informed as to what is going on in Washington: the electronic media, the print media, and Doonesbury, not necessarily in that order.

In addition, the Dayton Amateur Radio Association hosts the annual Dayton Hamvention, North America's largest hamfest, at Hara Arena.

In 1947, he claims to have become the first DJ to use twin turntables for continuous play, and in 1958 became a radio DJ at Radio Luxembourg.

In 1960, Frank Drake conducted the first search for radio signals from extraterrestrial civilizations at the National Radio Astronomy Observatory in Green Bank, West Virginia.

She won a listeners ' poll by Radio Mirror magazine as the top ranking comedienne of 1948 – 1949, receiving her award at the end of an Our Miss Brooks broadcast that March.

Radio fax is still in common use today for transmitting weather charts and information to ships at sea.

Forth was first exposed to other programmers in the early 1970s, starting with Elizabeth Rather at the US National Radio Astronomy Observatory.

* The New York Public Radio WNYC Archives maintains a Twitter feed that features " tweets " from transcripts of LaGuardia's Talk to the People radio program at twitter. com.

* Radio: A number of diffuse structures emitting at radio frequencies have been found in clusters.

After serving in the Air Force, he moved to New York City and worked at Radio City Music Hall while looking for acting work.

WRNY and Radio News were used to cross-promote each other, with programs on his station often used to discuss articles he had published, and articles in the magazine often covering program activities at WRNY.

Around the same time, Robert Watson-Watt, working at the Radio Research Station in Slough, UK, suggested that the ionospheric sporadic E layer ( Es ) appeared to be enhanced as a result of lightning but that more work was needed.

Historic stations and huts on the island are Hoyberg, Vera, Olsbu, Puppebu ( cabin ), Gamlemetten or Gamlestasjonen ( the old weather station ), Jan Mayen Radio, Helenehytta, Margarethhytta, and Ulla ( a cabin at the foot of the Beerenberg ).

On the 27th November 2004 a Blue Plaque presented by the Institute of Physics was unveiled at the Norman Lockyer Observatory, Sidmouth, to mark 100 years since the invention of the Thermionic Radio Valve.

Radio Lebanon also relays Radio France International at 13: 00 ( UTC ) daily.