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RATAN­600 MICROWAVE SPECTRAL OBSERVATIONS OF
THE SUN -- TODAY AND FUTURE
V.M. Bogod
Special Astrophysical Observatory of RAS, Saint­Petersburg, Russia
vbog@gao.sb.ru
Problems of solar radio emission study with the help of the RATAN­600 radio telescope are
considered. It is shown that the main scientific results were attained due to the continual
improvement of instrumental parameters. In the case of solar investigations many new
features of active solar plasma were detected, in particular:
. A small­scale radio emission structure of the Quiet Sun (a so­called ``radio granula­
tion'');
. Neutral line associated sources in solar active regions;
. Non­thermal radio emission above sunspots groups, so named ``the decimetre halo'';
. Cyclotron lines in the active regions;
. Multiple polarization inversions in flare­productive active regions;
. Relations between the double polarization inversions e#ect at microwaves and Noise
Storms activity at meter waves;
. The short­wave increasing of polarization flux before big flares;
. The ``darkening'' radio emission e#ect in flare­productive active regions;
. An evolution of polarization flux spectrum before big flares;
. Discovery of micro­bursts and their relation with Noise Storms;
. Detection of a frequency boundary between S­ and B­components and others.
Examples of the features listed above are described. A possible future development of
solar investigations with RATAN­600 is discussed.