Experimental Study of a 45-MHz Array for Radio Astronomy

Details Experimental Study of a 45-MHz Array for Radio Astronomy Experimental Study of a 45-MHz Array for Radio Astronomy

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....5..315a&link_type=abstract

Experimental Astronomy, Volume 5, Issue 3-4, pp. 315-328

Astronomy and Astrophysics

Astronomy

3

Radioastronomy, Instrumentation, Radiotelescope, Array

Scientific paper

The University of Chile transit radiotelescope is a 528-dipole array operating at 45 MHz. We present a comparison of an experimental study of the antenna radiation pattern with the basic theoretical pattern in three dimensions. We concentrate in the meridian plane diagram since this is particularly difficult to measure for an array like ours. The comparison shows excellent agreement. We have measured several important antenna parameters like the effective area as a function of zenith distance, the orientation of the plane of the array and the pointing accuracy. We include a detailed treatment of these subjects since not much information related to low frequency arrays for radio astronomy can be found in the literature. We discuss the importance of knowing these parameters in the preparation of the 45-MHz Sky Survey under way at the University of Chile Radio Observatory.

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