Complex, off-axis sidelobes of a radio telescope caused by feed-support legs

Details Complex, off-axis sidelobes of a radio telescope caused by feed-support legs Complex, off-axis sidelobes of a radio telescope caused by feed-support legs

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.258..217h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 258, no. 1, Sept. 1, 1992, p. 217-224.

Astronomy and Astrophysics

Astronomy

5

Electromagnetic Interference, Radio Telescopes, Sidelobes, Solar Radiation, Supports, Antenna Feeds, Radio Astronomy

Scientific paper

We present a model to explain how astronomical observations with a radio telescope may be contaminated by solar radiation, even when the sun lies far from the object being studied. The solar interference is caused by scattering from the legs which support the feed and receiver system. Based on the model, we provide formulae which permit us to predict where on the sky, and when, the interference will occur and also to estimate its approximate strength. Our work is relevant to all parabolic radio telescopes with feed-support legs, whether they be single dishes or part of synthesis arrays.

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