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RATAN-600 MICROWAVE SPECTRAL OBSERVATIONS OF THE SUN ­ TODAY AND FUTURE
V.M. Bogo d Sp ecial Astrophysical Observatory of RAS, Saint-Petersburg, Russia vb og@gao.sb.ru Problems of solar radio emission study with the help of the RATAN-600 radio telescop e 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 small-scale radio emission structure of the Quiet Sun (a so-called "radio granulation"); · Neutral line asso ciated sources in solar active regions; · Non-thermal radio emission ab ove sunsp ots groups, so named "the decimetre halo"; · Cyclotron lines in the active regions; · Multiple p olarization inversions in flare-pro ductive active regions; · Relations b etween the double p olarization inversions effect at microwaves and Noise Storms activity at meter waves; · The short-wave increasing of p olarization flux b efore big flares; · The "darkening" radio emission effect in flare-pro ductive active regions; · An evolution of p olarization flux sp ectrum b efore big flares; · Discovery of micro-bursts and their relation with Noise Storms; · Detection of a frequency b oundary b etween S- and B-comp onents and others. Examples of the features listed ab ove are describ ed. A p ossible future development of solar investigations with RATAN-600 is discussed.