The Long Wavelength Array

STEVEN W. ELLINGSON; TRACY E. CLARKE; AARON COHENJOSEPH CRAIGNAMIR E. KASSIMYLVA PIHLSTROMLEE J RICKARDGREGORY B. TAYLOR

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The Long Wavelength Array

机译：The Long Wavelength Array

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The Long Wavelength Array (LWA) will be a new multipurpose radio telescope operating in the frequency range 10-88 MHz. Upon completion, the LWA will consist of 53 phased array "stations" distributed over a region about 400 km in diameter in the state of New Mexico. Each station will consist of 256 pairs of dipole-type antennas whose signals are formed into beams, with outputs transported to a central location for high-resolution aperture synthesis imaging. The resulting image sensitivity is estimated to be a few millijanskys (5sigma, 8 MHz, two polarizations, 1 h, zenith) in 20-80 MHz; with resolution and field of view of (8", 8 deg) and (2", 2 deg) at 20 and 80 MHz, respectively. Notable engineering features of the instrument, demonstrated in this paper, include Galactic-noise limited active antennas and direct sampling digitization of the entire tuning range. This paper also summarizes the LWA science goals, specifications, and analysis leading to top-level design decisions.

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来源
《Proceedings of the IEEE》 |2009年第8期|1421-1430|共10页
作者
STEVEN W. ELLINGSON; TRACY E. CLARKE; AARON COHENJOSEPH CRAIGNAMIR E. KASSIMYLVA PIHLSTROMLEE J RICKARDGREGORY B. TAYLOR;
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作者单位

Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 USA;

U.S. Naval Research Laboratory, Washington, DC 20375 USA;

LWA Project Office, University of New Mexico, Albuquerque, NM 87131 USADepartment of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131 USA;

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原文格式 PDF
正文语种英语
中图分类计量学;
关键词
Aperture synthesis imaging; digital beamforming; radio astronomy;

The Long Wavelength Array

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