Analysis of ultra-fast fine structures of microwave bursts

With a high time resolution of 1 millisecond, we have observed some ultra-fast fine structures of the microwave bursts at the frequency of 2.84 GHz. A preliminary analysis has shown that the background continuum of the microwave bursts can be interpreted as gyro-synchrotron radiation in large regions while the fast spikes superimposed on the continuum may be generated by plasma radiation in much smaller regions.