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- KAIRA abstract "The Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) is an astronomical observatory operated by the Sodankylä Geophysical Observatory on behalf of Oulu University. It is located at Kilpisjärvi, Enontekiö near the border with Norway. It comprises two LOFAR-derived radio telescope systems and is capable of observing at HF and VHF radio frequencies. It is used for atmospheric, near-Earth space and astronomical research. KAIRA uses LOFAR phased-array antennas and digital signal-processing hardware. The phased array configuration has no moving parts and with digital control, allows KAIRA to quickly scan the sky, giving KAIRA a large field of view. KAIRA can produce a continuous all-sky image of the radio transparency of ionosphere, using cosmic radio noise for \"illumination\". KAIRA can also obtain electron density profiles in the atmosphere. In addition to near-space imaging, the use of KAIRA has been demonstrated for long-baseline interferometry observations of pulsars.It operates as either a stand-alone passive receiver, as a receiver for the EISCAT VHF incoherent scatter radar located at Ramfjordmoen, near Tromsø, Norway, or for use in conjunction with other regional VHF experiments. The site is also a pathfinder for the EISCAT_3D system.The system consists of a phased array receivers grouped in two separate arrays – one composed of 48 LOFAR Low-Band Antennas (LBA) covering the 10–90 MHz band and another composed of 48 LOFAR High-Band Antenna (HBA) covering the 110–270 MHz range. The HBA array is oriented in the direction of the EISCAT Tromsø radar, which transmits at approximately 224 MHz. Together with the EISCAT transmitter, KAIRA forms a bistatic radar system, capable on performing observation with at least 20 simultaneously beams pointing at different altitudes along the EISCAT transmitter beams.The LBA array has been configured approximately the same as the inner configuration of a LOFAR remote station (RS-INNER). The circular, quasi-random antenna distribution has been chosen to optimise the beam pattern of the array. The LBA array is used for radio astronomy, ionospheric scintillation, riometry and other passive receiver experiments.".
- KAIRA thumbnail KAIRA.jpg?width=300.
- KAIRA wikiPageExternalLink KAIRA.
- KAIRA wikiPageExternalLink kaira-film.html.
- KAIRA wikiPageExternalLink KAIRA.
- KAIRA wikiPageID "38972914".
- KAIRA wikiPageLength "4613".
- KAIRA wikiPageOutDegree "28".
- KAIRA wikiPageRevisionID "707893435".
- KAIRA wikiPageWikiLink Bistatic_radar.
- KAIRA wikiPageWikiLink Category:Astronomical_observatories_in_Finland.
- KAIRA wikiPageWikiLink Category:Enontekiö.
- KAIRA wikiPageWikiLink Category:Radio_telescopes.
- KAIRA wikiPageWikiLink EISCAT.
- KAIRA wikiPageWikiLink Enontekiö.
- KAIRA wikiPageWikiLink Finland.
- KAIRA wikiPageWikiLink High_frequency.
- KAIRA wikiPageWikiLink Ionosphere.
- KAIRA wikiPageWikiLink Kilpisjärvi.
- KAIRA wikiPageWikiLink LOFAR.
- KAIRA wikiPageWikiLink Norway.
- KAIRA wikiPageWikiLink Observatory.
- KAIRA wikiPageWikiLink Phased_array.
- KAIRA wikiPageWikiLink Pulsar.
- KAIRA wikiPageWikiLink Radiation_pattern.
- KAIRA wikiPageWikiLink Radio_telescope.
- KAIRA wikiPageWikiLink Tromsø.
- KAIRA wikiPageWikiLink University_of_Oulu.
- KAIRA wikiPageWikiLink Very-long-baseline_interferometry.
- KAIRA wikiPageWikiLink Very_high_frequency.
- KAIRA wikiPageWikiLinkText "KAIRA".
- KAIRA wikiPageWikiLinkText "Kilpisjärvi Atmospheric Imaging Receiver Array".
- KAIRA altitude "495.0".
- KAIRA location Enontekiö.
- KAIRA location Finland.
- KAIRA location Kilpisjärvi.
- KAIRA name "Kilpisjärvi Atmospheric Imaging Receiver Array".
- KAIRA organization University_of_Oulu.
- KAIRA telescope1Name "KAIRA HBA".
- KAIRA telescope1Type "50".
- KAIRA telescope2Name "KAIRA LBA".
- KAIRA telescope2Type "34".
- KAIRA website KAIRA.
- KAIRA wikiPageUsesTemplate Template:Coord.
- KAIRA wikiPageUsesTemplate Template:Infobox_Observatory.
- KAIRA wikiPageUsesTemplate Template:Observatory-stub.
- KAIRA wikiPageUsesTemplate Template:Start_date.
- KAIRA subject Category:Astronomical_observatories_in_Finland.
- KAIRA subject Category:Enontekiö.
- KAIRA subject Category:Radio_telescopes.
- KAIRA hypernym Observatory.
- KAIRA point "69.07083333333334 20.761944444444445".
- KAIRA type Place.
- KAIRA type SpatialThing.
- KAIRA comment "The Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) is an astronomical observatory operated by the Sodankylä Geophysical Observatory on behalf of Oulu University. It is located at Kilpisjärvi, Enontekiö near the border with Norway. It comprises two LOFAR-derived radio telescope systems and is capable of observing at HF and VHF radio frequencies. It is used for atmospheric, near-Earth space and astronomical research.".
- KAIRA label "KAIRA".
- KAIRA sameAs Q9037283.
- KAIRA sameAs KAIRA.
- KAIRA sameAs KAIRA.
- KAIRA sameAs KAIRA.
- KAIRA sameAs m.0s993jl.
- KAIRA sameAs KAIRA.
- KAIRA sameAs Q9037283.
- KAIRA lat "69.07083333333334".
- KAIRA long "20.761944444444445".
- KAIRA wasDerivedFrom KAIRA?oldid=707893435.
- KAIRA depiction KAIRA.jpg.
- KAIRA homepage KAIRA.
- KAIRA isPrimaryTopicOf KAIRA.