Interferometer observations of McMath region No. 14943 and 14979 at 8.6 mm wavelength

During the passage of the intense active regions, McMath region No. 14943 and 19474, i.e. the return of 14943, five outstanding radio events were observed, namely two outbursts with post burst increases and three GRF by the 35 GHz solar interferometer at Nagoya. The interferometer used for the present observations consists of sixteen antennae placed with equal spacing on an east-west line and has a maximum baseline of 5850 wavelengths. McMath region No. 14943 was already very active before it appeared at the east limb of the sun on September 8, 1977. A very intense outburst was first observed at 2231 UT on September 7. At the time of maximum of the outburst, the angle of the sun from the meridian plane was too large, and then the half power beam width was too broad to determine the location of the source precisely. If it is assumed that the radio source at 8.6 mm is located at the same latitude as that of S-component at 8 cm, the height of the source of the post burst increase is 0.05 +- 0.02 R above the photosphere. (Yoshimori, M.)