太阳微波爆发中尖峰辐射的带宽计算

Bandwidth of Spikes in Solar Microwave Bursts

国家天文台怀柔太阳观测站'1.08～2.04GHz太阳射电频谱仪'所观测的2003年10月27太阳射电爆发事件中,发现有非常明显的尖峰辐射群.在对这些尖峰辐射应用小波分析的基础上,分别用记录尺度和特征检测2种方法计算出其最小带宽和平均带宽,并对结果作了分析比较.

Two groups of spikes were recorded by the 1.08 - 2.04GHz spectrometer of National Astronomical observatories of China on 27 October 2003. The mean and minimum bandwidths of spikes are calculated with two different methods based on the wavelet analysis. The first method determines the dominant spike bandwidth scale based on their scalegram, and the second method is a feature detection algorithm in the time-frequency plane. Finally the results are compared and discussed.