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The aim of the reports is to show the different spectral and
polarization features of radio
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emission
in active and stable solar
structures, The structures were observed with moderate spatial
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and
frequency resolution at RATAN-600. The future progress in the study with
the help of FASR can
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be
expected.
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At
Fig.3 the example of one-dimensional scan with RATAN-600 observation both
at one wavelength
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and
many wavelength in the range from 1.8 cm to 17.1 cm is superimposed on the
solar disk.
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At
the Fig.4 and 5 we demonstrate the spectral behaviour of different
polarization details in wide
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wavelength
range.
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The
importance of high flux sensitivity is needed for study of weak
polarization signal. This is
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demonstrated
at the Fig. 6, 8 and 9. The high dynamic range using in RATAN observations
is shown
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at
Fig. 7.
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The
Fig. 10, 11, 12 and 13 are devoted to different spectral-polarization
features of preflare plasma,
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which
appear in flare-productive active regions before powerful flares.
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The
interesting effect connected with radioemission depression before flare is
demonstrated at Fig 14
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(microwave
«darkening») and Fig.15 (associated polarization inversion).
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