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- W2000985008 abstract "The relative merits of T- and cross-type radio telescopes are discussed. A large array used for radio astronomical studies at a frequency of 22.25 MHz ( <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>lambda = 13.5</tex> m) is described. It is built in the form of a T with dimensions <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>96lambda times 2.5lambda</tex> east-west and <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>32.5lambda times 4lambda</tex> north-south. The 624 full-wave dipoles are mounted <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>lambda/8</tex> above a 65 000 m <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> reflecting screen. The instrument has a pencil-beam response of <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1.1 times 1.7</tex> degrees at the zenith. A timesharing technique is used to provide simultaneous observations of 5 adjacent declinations spaced at quarter-beamwidth intervals. Observations, commenced in 1965, should provide flux density measures for 400-500 radio sources down to a limiting flux density of about <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>30 times 10^{-26}</tex> W .m <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-2</sup> Hz <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-1</sup> . A map of the galactic background radiation from declination +90 to -20 degrees is being prepared." @default.
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- W2000985008 title "Large 22-MHz array for radio astronomy" @default.
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