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利用傅里叶分析法，把速度型宽频带数字地震记录变成台站人员所熟悉的长周期（７６３）、中长周期（ＳＫ）模拟常规地震记录，分析人员能在仿真后的记录波形图上识别震相和计算震级，为地震台站用宽频带数字地震记录取代模拟记录提供了一种资料处理方法
Using Fourier analysis, the velocity-based wide-band digital seismograms were converted into long-period (763) and medium-long period (SK) analog conventional seismograms well-known to the observatories. Analysts can use the recorded waveforms The identification of seismic facies and the calculation of magnitude provide a data processing method for seismic stations to replace analog records with wideband digital seismograms