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Active Adaptive Arrays: The Astron Approach to SKA

Published online by Cambridge University Press:  12 April 2016

Richard G. Strom ,
Bart Smolders  and
Arnold van Ardenne
Richard G. Strom
Affiliation:
ASTRON P.O. Box 2, 7990 AA Dwingeloo, Netherlands Astronomical Institute ‘Anton Pannekoek’, University of Amsterdam, Netherlands
Bart Smolders
Affiliation:
ASTRON P.O. Box 2, 7990 AA Dwingeloo, Netherlands
Arnold van Ardenne
Affiliation:
ASTRON P.O. Box 2, 7990 AA Dwingeloo, Netherlands

Abstract

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It has been argued, for a number of reasons, that the next generation radio telescope should be a multi-element interferometer with a collecting area of about 1 km2. The remaining parameters of such an instrument – frequency range, angular resolution, instantaneous bandwidth, etc. – will be science driven. The requirements for propagation studies are briefly discussed, and it is pointed out how variable-source confusion may differ from the normal variety. Finally, the Dutch project to achieve a large collecting area using adaptive arrays of active antennas is described. A systematic approach has been adopted, with the construction of arrays of increasing complexity to test design features at each state. Recently, development of a low frequency array (LOFAR) has become an additional option. It would facilitate tests of some of the larger instrument’s features, and provide real data on the influence of the ionosphere and interfering sources.

Type
Chapter Five Future Large Telescope Projects: SKA and FAST
Information
International Astronomical Union Colloquium , Volume 182: Sources and Scintillations: Refraction and Scattering in Radio Astronomy , 2001 , pp. 209 - 212
Copyright
Copyright © Kluwer 2001

References

Van Ardenne, A.: 1999, The technology challenge for the next generation radio telescopes, in: Smolders, A.B. and van Haarlem, M.P. (eds.), Perspectives on Radio Astronomy: Technologies for Large Antenna Arrays, ix–xviii, Astron, Dwingeloo.Google Scholar
Van Ardenne, A., Smolders, B. and Hampson, G.: 2000, Active adaptive antennas for radio astronomy; results of the R&D program toward the Square Kilometer Array, Proc. SPIE Conf. 4015 Radio Telescopes, Butcher, H.R. (ed.), 420–433.CrossRefGoogle Scholar
Frail, D.A., Diamond, P.J., Cordes, J.M. and van Langevelde, H.J.: 1994, Anisotropic scattering of OH/IR stars toward the Galactic center, Astrophys. J. 427, L43–L46.CrossRefGoogle Scholar
Strom, R.G., Peng, B. and Nan, R.: 1996, Proc. 3rd Meeting of the Large Telescope Working Croup & Workshop on Spherical Radio Telescopes, International Academic Publishers, Beijing.Google Scholar