THE TIME VARIATION CHARACTERISTICS OF SOLAR MICROWAVE IMPULSIVE EVENT

During the Periods of January 1988-December 1989,fifteen solar impulsive events reported by Berne University, Switzerland are analysed in this paper.And three main characteristics,impulsiveness,asymmetry and variation of width at half power maximum with frequency on the bine profiles of events are found.They may be interpreted qualitatively by means of continuous injection of nonthermal electrons and a nonuniform source region model.