OBSERVATIONS OF SOLAR MICROWAVE SPIKES WITH HIGH-SPATIAL-RESOLUTION AT THE SSRT - FIRST RESULTS

The first observations of spatial and temporal features of subsecond s pike events at the Siberian Solar Radio Telescope (SSRT) are reported. For the limb event of 2 November 1992 the emission source was found t o be located at a height of 35 thousand km above the photosphere. The apparent size of the spike emission source (tens of arcsec) is unexpec tedly large and comparable with those of the corresponding burst conti nuum source. The possible role of electron cyclotron maser emission (E CME) mechanism and plasma emission is discussed and the plasma paramet ers are estimated in the framework of these two models.