First, about Nobeyama Radioheliograph instrument, its characteristics

Then introduction how the Sun looks like at 17 GHz
 Quiet sun, active region

Most of the time is spend on flare observations: summaries of observations
By the Nobeyama radioheliograph.  Its geometry and dynamics of thermal and nonthermal flares.  Oscillation studies

To interpret the results from observations, a new solar flare scenario is proposed.  Not by the reconnection scenario, but by high beta disruption or ballooning instability.