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The paper covers characteristics of big interferometers and reflecting radio telescopes intended for the studies of the solar atmosphere radiation. Solar radio interferometers (radioheliographs) have proven to be more cost-effective than single dish radio telescopes, since using the aperture synthesis allows for fast imaging of the Sun and its active regions with higher spatial resolution, thus, studying...
We describe two methods of fast condition diagnostics of the reflecting surface of the RATAN-600 radio telescope. The first one is based on a radio holography, and the second one relies on measurements of the random scattered background in the observations of the extended radio sources. Both methods were used in the antenna measurements, which proved the reflecting surface of the of the radio telescope...
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