The receiver function technique is widely used to image crustal structure using P-to-S converted phases at the Moho discontinuity. However, the presence of sedimentary layer generates additional P-to-S conversions and reverberations, which can overprint the Moho phases and pose problems in imaging crustal structure with standard receiver function techniques. We introduce a robust two-step method that uses H-κ stacking to determine average thickness and Vp/Vs of the sedimentary layer, followed by waveform-fitting of the observed receiver function to constrain the average crustal thickness and sub-sediment Vp/Vs. We tested the method using both synthetic data and real-data from stations located on sedimentary layers in the Netherlands and USA. We show that the new method outperforms other common approaches in retrieving accurate Moho depth and sub-sediment Vp/Vs estimates, even in cases where the Moho phases are completely overprinted by large-amplitude phases related to sedimentary layers.

中文翻译：

---

接收器函数的波形拟合，用于增强存在沉积物时地壳结构的反演

接收函数技术广泛用于利用莫霍面不连续处的 P-to-S 转换相位对地壳结构进行成像。然而，沉积层的存在会产生额外的 P 到 S 转换和混响，这可能会叠加莫霍面，并在使用标准接收器函数技术对地壳结构成像时造成问题。我们引入了一种稳健的两步方法，该方法使用 H- κ叠加来确定沉积层的平均厚度和 Vp/Vs，然后对观测到的接收函数进行波形拟合，以约束平均地壳厚度和底层沉积物 Vp/Vs 。我们使用荷兰和美国沉积层站的合成数据和实际数据测试了该方法。我们表明，即使在莫霍面完全被与沉积层相关的大振幅相位覆盖的情况下，新方法在检索准确的莫霍面深度和沉积物下 Vp/Vs 估计方面也优于其他常见方法。