5、Peak Spectral Frequency （峰值谱频率） 检测由于上覆异常引起的频率吸收现象。一种坚固的属性，比其它频率属性稳定， 因而对噪声数据尤为有用。
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相函数的自功率谱一般具有两个峰值频率，其相应的频率分量决定相函数的波峰特征。
The auto power spectrum of phase function commonly has two extreme frequencies, and the corresponding frequency components decide the peak characteristics of phase function.
结果表明，谱比曲线上最大峰值处的频率大小显著地反映了覆盖层的薄厚。
These curves show that the frequency value corresponding to maximum peak obviously reflect the sediment layers' thickness.
为了解决SSCA在循环谱估计中出现循环谱泄露和错误循环频率峰值的问题，提出了一种改进算法，该算法改进之处在于线性内插和窗函数的选择。
To solve the problem of existing cycle leakage and introducing artificial cyclic features, an innovatory SSCA is proposed based on linear interpolation and proper window choice.
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