2-DIMENSIONAL MAPPING OF THE SUN WITH THE RATAN-600

We present two-dimensional solar maps at 2.7, 3.2, 4, and 8.2 cm compu ted from one-dimensional observations with the RATAN-600, using Earth rotation aperture synthesis techniques. Before the calculation of maps , the position of each scan was corrected with respect to the center o f the solar disk and the scans were calibrated. The circular polarizat ion scans were corrected for polarization cross-talk between the I and V channels. Subsequently, the quiet-Sun background emission was subtr acted. After all corrections, a dirty map was computed by combining th e scans at different position angles. The last step of the processing was an attempt to free the dirty map of the sidelobes, using the stand ard CLEAN procedure. The resolution of the clean maps at 2.7 cm was 0. 5' by 6'. Both active regions which were present on the solar disk wer e mapped. We studied the flux spectra of different types of sources: o ne was associated with a sunspot, the second was located over the neut ral line of an active region, and the other was associated with the pl age. The emission mechanism of the former was attributed to the gyrore sonance process, while the short wavelength emission of the others was attributed to the free-free process. For the sunspot-associated sourc e we estimated the magnetic field strengths at the base of the transit ion region and in the low corona.