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Proceedings Paper

The Allen Telescope Array
Author(s): David R. DeBoer; William J. Welch; John Dreher; Jill Tarter; Leo Blitz; Michael Davis; Matt Fleming; Douglas Bock; Geoffrey Bower; John Lugten; G. Girmay-Keleta; Larry R. D'Addario; Gerry R. Harp; Rob Ackermann; Sander Weinreb; Greg Engargiola; Doug Thornton; Niklas Wadefalk
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Paper Abstract

The Allen Telescope Array, originally called the One Hectare Telescope (1hT) [1] will be a large array radio telescope whose novel characteristics will be a wide field of view (3.5 deg-GHz HPBW), continuous frequency coverage of 0.5 - 11 GHz, four dual-linear polarization output bands of 100 MHz each, four beams in each band, two 100 MHz spectral correlators for two of the bands, and hardware for RFI mitigation built in. Its scientific motivation is for deep SETI searches and, at the same time, a variety of other radio astronomy projects, including transient (e.g. pulsar) studies, HI mapping of the Milky Way and nearby galaxies, Zeeman studies of the galactic magnetic field in a number of transitions, mapping of long chain molecules in molecular clouds, mapping of the decrement in the cosmic background radiation toward galaxy clusters, and observation of HI absorption toward quasars at redshifts up to z=2. The array is planned for 350 6.1-meter dishes giving a physical collecting area of about 10,000 square meters. The large number of components reduces the price with economies of scale. The front end receiver is a single cryogenically cooled MIMIC Low Noise Amplifier covering the whole band. The feed is a wide-band log periodic feed of novel design, and the reflector system is an offset Gregorian for minimum sidelobes and spillover. All preliminary and critical design reviews have been completed. Three complete antennas with feeds and receivers are under test, and an array of 33 antennas is under construction at the Hat Creek Radio Observatory for the end of 2004. The present plan is to have a total of about 200 antennas completed by the summer of 2006 and the balance of the array finished before the end of the decade.

Paper Details

Date Published: 28 September 2004
PDF: 8 pages
Proc. SPIE 5489, Ground-based Telescopes, (28 September 2004); doi: 10.1117/12.551737
Show Author Affiliations
David R. DeBoer, SETI Institute (United States)
William J. Welch, Univ. of California/Berkeley (United States)
John Dreher, SETI Institute (United States)
Jill Tarter, SETI Institute (United States)
Leo Blitz, Univ. of California/Berkeley (United States)
Michael Davis, SETI Institute (United States)
Matt Fleming, Univ. of California/Berkeley (United States)
Douglas Bock, Univ. of California/Berkeley (United States)
Geoffrey Bower, Univ. of California/Berkeley (United States)
John Lugten, Univ. of California/Berkeley (United States)
G. Girmay-Keleta, SETI Institute (United States)
Larry R. D'Addario, SETI Institute (United States)
Gerry R. Harp, SETI Institute (United States)
Rob Ackermann, SETI Institute (United States)
Sander Weinreb, Jet Propulsion Lab. (United States)
Greg Engargiola, Univ. of California/Berkeley (United States)
Doug Thornton, Univ. of California/Berkeley (United States)
Niklas Wadefalk, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 5489:
Ground-based Telescopes
Jacobus M. Oschmann Jr., Editor(s)

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