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- Nançay_radio_telescope abstract "The Nançay decimetric radio telescope (Le radiotélescope décimétrique de Nançay (NRT)) is located in the small commune of Nançay, two hours' drive south of Paris, France. The radio telescope saw first light in 1965, after an inauguration by the then French president, Charles de Gaulle. It is one of the largest radio telescopes in the world.The NRT is a transit instrument of the unusual Kraus-type design, with two mirrors. The flat, tilting primary mirror consists of ten panels, each 20 m long and 40 m (131 ft) high; it reflects radio waves towards the fixed secondary mirror 460 m to the south. The secondary mirror is shaped as a section of a sphere with a radius of 560 m: (1837 ft) it focuses the radio waves towards a mobile focal carriage 280 m to the north that contains antennas cooled by liquid helium to 20 K (−253.2 °C) and other receiving equipment. Both mirrors are covered with a metal mesh with square holes 12.5 mm on a side and a surface that is accurate to about 5 mm. The primary mirror tilts north-south to select any objects along the meridian, while the focal carriage moves east-west along a curved railroad track to follow objects across the sky. The NRT is capable of observing objects with a declination greater than −39°. Objects near the celestial equator can only be tracked for about an hour, but objects nearer the zenith can be tracked for longer. Since the mirrors of the telescope are much wider than they are high, its response function is highly elongated, being approximately 5 times wider in declination than in Right Ascension. Observations are typically undertaken at frequencies of 1,400 MHz (equivalent to a wavelength of 21 cm), 1,660 MHz (18 cm) and 3,330 MHz (9 cm).The central fifth of the NRT was constructed in 1961 as a proof of concept. The remainder was completed in 1964, and officially opened in 1965. Scientific observations started in 1967.The Kraus-type design, named after Dr. John D. Kraus (1910–2004), was first used at Ohio State University's Big Ear telescope.The Nançay Radioastronomy Facility includes several other operating radio telescopes: the Radio Heliograph, a T-shaped array (1.6 km by 1.25 km) composed of 47 antennas operating between frequencies of 150 and 450 MHz; the Decametric Array composed of 144 spiral antenna operating between wavelengths of 3 m and 30 m; the Radio Frequency Monitoring Antenna, mounted on a tower 22 metres above the ground, and observing at regular intervals each day on two frequency bands between 100 and 500 MHz and between 1 and 4 GHz. the CODALEMA project, dedicated to the study of cosmic rays; an international LOFAR station (named FR606); one of the two experimental EMBRACE (Electronic MultiBeam Radio Astronomy ConcEpt) phased array telescopes, part of the Research and Development program for the Phase 2 of the Square Kilometre Array (SKA) project.↑ ↑".
- Nançay_radio_telescope thumbnail Nancay_radiotelescope_miroir_primaire.jpg?width=300.
- Nançay_radio_telescope wikiPageExternalLink maps?t=k&ie=UTF8&om=1&ll=47.369524,2.199583&spn=0.026449,0.058537.
- Nançay_radio_telescope wikiPageExternalLink en.
- Nançay_radio_telescope wikiPageExternalLink www.poledesetoiles.fr.
- Nançay_radio_telescope wikiPageID "520771".
- Nançay_radio_telescope wikiPageLength "4692".
- Nançay_radio_telescope wikiPageOutDegree "43".
- Nançay_radio_telescope wikiPageRevisionID "706276963".
- Nançay_radio_telescope wikiPageWikiLink Antenna_(radio).
- Nançay_radio_telescope wikiPageWikiLink CODALEMA.
- Nançay_radio_telescope wikiPageWikiLink Category:Astronomical_observatories_in_France.
- Nançay_radio_telescope wikiPageWikiLink Category:LOFAR.
- Nançay_radio_telescope wikiPageWikiLink Category:Radio_telescopes.
- Nançay_radio_telescope wikiPageWikiLink Celestial_equator.
- Nançay_radio_telescope wikiPageWikiLink Charles_de_Gaulle.
- Nançay_radio_telescope wikiPageWikiLink Communes_of_France.
- Nançay_radio_telescope wikiPageWikiLink Declination.
- Nançay_radio_telescope wikiPageWikiLink EMBRACE_(telescope).
- Nançay_radio_telescope wikiPageWikiLink First_light_(astronomy).
- Nançay_radio_telescope wikiPageWikiLink Focus_(optics).
- Nançay_radio_telescope wikiPageWikiLink France.
- Nançay_radio_telescope wikiPageWikiLink Frequency.
- Nançay_radio_telescope wikiPageWikiLink Hertz.
- Nançay_radio_telescope wikiPageWikiLink John_D._Kraus.
- Nançay_radio_telescope wikiPageWikiLink Kraus-type.
- Nançay_radio_telescope wikiPageWikiLink LOFAR.
- Nançay_radio_telescope wikiPageWikiLink Liquid_helium.
- Nançay_radio_telescope wikiPageWikiLink Meridian_(astronomy).
- Nançay_radio_telescope wikiPageWikiLink Meridian_circle.
- Nançay_radio_telescope wikiPageWikiLink Mirror.
- Nançay_radio_telescope wikiPageWikiLink Nançay.
- Nançay_radio_telescope wikiPageWikiLink Ohio_State_University.
- Nançay_radio_telescope wikiPageWikiLink Ohio_State_University_Radio_Observatory.
- Nançay_radio_telescope wikiPageWikiLink Paris.
- Nançay_radio_telescope wikiPageWikiLink Phased_array.
- Nançay_radio_telescope wikiPageWikiLink President_of_France.
- Nançay_radio_telescope wikiPageWikiLink Primary_mirror.
- Nançay_radio_telescope wikiPageWikiLink Radio.
- Nançay_radio_telescope wikiPageWikiLink Radio_telescope.
- Nançay_radio_telescope wikiPageWikiLink Radius.
- Nançay_radio_telescope wikiPageWikiLink Rail_transport.
- Nançay_radio_telescope wikiPageWikiLink Secondary_mirror.
- Nançay_radio_telescope wikiPageWikiLink Sphere.
- Nançay_radio_telescope wikiPageWikiLink Spiral_antenna.
- Nançay_radio_telescope wikiPageWikiLink Square_Kilometre_Array.
- Nançay_radio_telescope wikiPageWikiLink Wavelength.
- Nançay_radio_telescope wikiPageWikiLink Zenith.
- Nançay_radio_telescope wikiPageWikiLink File:NRT_Concept.svg.
- Nançay_radio_telescope wikiPageWikiLink File:Nancay_radiotelescope_miroir_primaire.jpg.
- Nançay_radio_telescope wikiPageWikiLinkText "Nançay radio telescope".
- Nançay_radio_telescope altitude "131 m".
- Nançay_radio_telescope area "8000".
- Nançay_radio_telescope built "1961".
- Nançay_radio_telescope caption "Nançay radio telescope's primary mirror".
- Nançay_radio_telescope location Nançay.
- Nançay_radio_telescope mounting "Kraus-type design".
- Nançay_radio_telescope name "Nançay radio telescope".
- Nançay_radio_telescope style "Transit".
- Nançay_radio_telescope wavelength "918".
- Nançay_radio_telescope wikiPageUsesTemplate Template:Convert.
- Nançay_radio_telescope wikiPageUsesTemplate Template:Coord.
- Nançay_radio_telescope wikiPageUsesTemplate Template:Infobox_telescope.
- Nançay_radio_telescope wikiPageUsesTemplate Template:Radio-astronomy.
- Nançay_radio_telescope wikiPageUsesTemplate Template:Reflist.
- Nançay_radio_telescope subject Category:Astronomical_observatories_in_France.
- Nançay_radio_telescope subject Category:LOFAR.
- Nançay_radio_telescope subject Category:Radio_telescopes.
- Nançay_radio_telescope point "47.38333333333333 2.2".
- Nançay_radio_telescope type Diacritic.
- Nançay_radio_telescope type Redirect.
- Nançay_radio_telescope type SpatialThing.
- Nançay_radio_telescope comment "The Nançay decimetric radio telescope (Le radiotélescope décimétrique de Nançay (NRT)) is located in the small commune of Nançay, two hours' drive south of Paris, France. The radio telescope saw first light in 1965, after an inauguration by the then French president, Charles de Gaulle. It is one of the largest radio telescopes in the world.The NRT is a transit instrument of the unusual Kraus-type design, with two mirrors.".
- Nançay_radio_telescope label "Nançay radio telescope".
- Nançay_radio_telescope sameAs Q1671656.
- Nançay_radio_telescope sameAs Nançay-Radioteleskop.
- Nançay_radio_telescope sameAs Station_de_radioastronomie_de_Nançay.
- Nançay_radio_telescope sameAs m.02l0f_.
- Nançay_radio_telescope sameAs Q1671656.
- Nançay_radio_telescope lat "47.38333333333333".
- Nançay_radio_telescope long "2.2".
- Nançay_radio_telescope wasDerivedFrom Nançay_radio_telescope?oldid=706276963.
- Nançay_radio_telescope depiction Nancay_radiotelescope_miroir_primaire.jpg.
- Nançay_radio_telescope homepage en.
- Nançay_radio_telescope isPrimaryTopicOf Nançay_radio_telescope.