进行谱分析时,数据的离散时间间隔Δt=0.5秒,按相关函数法求谱时样本容量N=1200,按FFT法时,N=1024。分析分两步进行,首先进行予处理,其中包括消除趋势项及各种统计检验,然后进行谱计算,谱计算中各参数按文献方法选定。通过分析,获得该地区共计178个谱及相应的谱参数,在此基础上给出了一个在该地区最可能出现的谱的计算式。 For spectral analysis, the discrete time interval of the data, Δt = 0.5 second, the sample size, N = 1200, was calculated using the correlation function method and N = 1024, according to the FFT method. Analysis in two steps, first of all to be processed, including the elimination of trend items and a variety of statistical tests, and then calculate the spectrum calculation of the parameters selected by the literature method. Through the analysis, a total of 178 spectra and corresponding spectral parameters are obtained in this area, and on this basis, a formula for the most likely spectrum in the area is given.