A radio quiet zone is an area where radio transmissions are restricted in order to protect a radio telescope[1] or a communications station[2] from radio frequency interference. The Radio Regulations of the International Telecommunication Union (ITU) define interference as being detrimental to radio astronomy if it increases measurement uncertainty by 10%. In particular, the applicable regulation is known as ITU-R Recommendation RA.769, "Protection criteria used for radio astronomical measurements".[3] Equipment that can cause interference includes mobile phones, television transmitters, and CB radios, as well as other electrical equipment.[1]
Quiet zones are located in areas that are sparsely populated, and may be enforced by government legislation.[1] A radio quiet zone is often divided into two zones: an exclusion zone where all radio emissions are prohibited, and a larger coordination zone of up to 100 km2 where the power levels of radio transmissions are suitably limited so as not to interfere with the radio telescope.[3]
^ abcd"Radio quiet in the Mid West". www.ska.gov.au. Australian Government, Department of Innovation, Industry, Science and. Retrieved 13 April 2017.
^ ab"National Radio Quiet Zone — Science Website". science.nrao.edu. Retrieved 13 April 2017.
^ abvan Driel, W. (June 2011), "Radio quiet, please! - protecting radio astronomy from interference", The Role of Astronomy in Society and Culture, Proceedings of the International Astronomical Union, IAU Symposium, Volume 260, p. 457-464, vol. 260, International Astronomical Union, p. 457, arXiv:0906.2268, Bibcode:2011IAUS..260..457V, doi:10.1017/S1743921311002675, S2CID 118632363.
^Umar, Roslan; Abidin, Zamri Zainal; Ibrahim, Zainol Abidin (8 May 2013). "The importance of Radio Quiet Zone (RQZ) for radio astronomy". AIP Conference Proceedings. 1528 (1): 32–37. Bibcode:2013AIPC.1528...32U. doi:10.1063/1.4803564. ISSN 0094-243X.
^"Radiobservatório do Itapetinga - ROI/INPE". www.cea.inpe.br. Retrieved 9 October 2017.
^Cohen, J.; et al. (April 2003), "Radio Quiet Zones", in Schwarz, H. E. (ed.), Light Pollution: The Global View, Astrophysics and Space Science Library, vol. 284, Kluwer Academic Publishers, Dordrecht, p. 225, Bibcode:2003ASSL..284..225C, doi:10.1007/978-94-017-0125-9_21.
External linksedit
Radio quiet zones around observatories, CRAF
November 01, 2023
radio, quiet, zone, radio, quiet, zone, area, where, radio, transmissions, restricted, order, protect, radio, telescope, communications, station, from, radio, frequency, interference, radio, regulations, international, telecommunication, union, define, interfe. A radio quiet zone is an area where radio transmissions are restricted in order to protect a radio telescope 1 or a communications station 2 from radio frequency interference The Radio Regulations of the International Telecommunication Union ITU define interference as being detrimental to radio astronomy if it increases measurement uncertainty by 10 In particular the applicable regulation is known as ITU R Recommendation RA 769 Protection criteria used for radio astronomical measurements 3 Equipment that can cause interference includes mobile phones television transmitters and CB radios as well as other electrical equipment 1 A map showing the extent of the United States National Radio Quiet Zone Quiet zones are located in areas that are sparsely populated and may be enforced by government legislation 1 A radio quiet zone is often divided into two zones an exclusion zone where all radio emissions are prohibited and a larger coordination zone of up to 100 km2 where the power levels of radio transmissions are suitably limited so as not to interfere with the radio telescope 3 Formal radio quiet zones exist around many observatories 4 including the Murchison Radio astronomy Observatory in Australia 1 the National Radio Astronomy Observatory and the Sugar Grove Station in West Virginia United States the United States National Radio Quiet Zone 2 the Itapetinga Radio Observatory in Brazil 5 and MeerKAT in South Africa as examples The ITU has recommended designating two locations in outer space as radio quiet zones the shielded zone on the Moon s far side and the Sun Earth Lagrangian point L2 6 See also editRadio spectrum pollution United States National Radio Quiet ZoneReferences edit a b c d Radio quiet in the Mid West www ska gov au Australian Government Department of Innovation Industry Science and Retrieved 13 April 2017 a b National Radio Quiet Zone Science Website science nrao edu Retrieved 13 April 2017 a b van Driel W June 2011 Radio quiet please protecting radio astronomy from interference The Role of Astronomy in Society and Culture Proceedings of the International Astronomical Union IAU Symposium Volume 260 p 457 464 vol 260 International Astronomical Union p 457 arXiv 0906 2268 Bibcode 2011IAUS 260 457V doi 10 1017 S1743921311002675 S2CID 118632363 Umar Roslan Abidin Zamri Zainal Ibrahim Zainol Abidin 8 May 2013 The importance of Radio Quiet Zone RQZ for radio astronomy AIP Conference Proceedings 1528 1 32 37 Bibcode 2013AIPC 1528 32U doi 10 1063 1 4803564 ISSN 0094 243X Radiobservatorio do Itapetinga ROI INPE www cea inpe br Retrieved 9 October 2017 Cohen J et al April 2003 Radio Quiet Zones in Schwarz H E ed Light Pollution The Global View Astrophysics and Space Science Library vol 284 Kluwer Academic Publishers Dordrecht p 225 Bibcode 2003ASSL 284 225C doi 10 1007 978 94 017 0125 9 21 External links editRadio quiet zones around observatories CRAF Retrieved from https en wikipedia org w index php title Radio quiet zone amp oldid 1175872654, wikipedia, wiki, book, books, library,
