Abstract
Large dishes used in solar radio astronomy are becoming an essential tool for the analysis of low level activity and fine time structures in solar bursts. Some front-end and back-end arrangements have been added to the Itapetinga 13.7-m radome-enclosed antenna to allow for simultaneous 22 GHz and 44 GHz observations; 22 GHz right- and left-handed circular polarization (or two linear orthogonal), with sensitivities of the order of 0.03 s.f.u., and time resolution of 1 ms. Full Sun maps can be obtained every 6 min, and selected active region maps every 3 min. Spatial angular definition of positions of active-region hot spots is close to 10 arc sec. This system is being used in a number of specific investigations, in SMM satellite related research, and in other internationally coordinated works. Examples of results are shown.
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Kaufmann, P., Strauss, F.M., Schaal, R.E. et al. The use of the large MM-wave antenna at Itapetinga in high-sensitivity solar research. Sol Phys 78, 389–399 (1982). https://doi.org/10.1007/BF00151619
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DOI: https://doi.org/10.1007/BF00151619