Observational Analysis of the Phases in Solar Flare Occurred Radio Fast Fine Structures

The statistical analysis of 40 solar radio events which were obtained with Radio Synchronous Observation System at four frequencies(1.42, 2.13, 2.84, and 4.26 GHz) in Yunnan Observatory during December 1989 to January 1994 and the spectrometer(2.6～3.8GHz) in Beijing Observatory during November 1996 to May 1998 is made in this paper. The phase of the radio FFS occurred at low frequency band of microwave(long centimeter to short decimeter wavelengths)in flare is approached. The regularity of the phase of flare occurred radio FFS in this frequency range is found.