Separation of P- and SV-Wavefields from Multi-Component OBC Data in the Tau-P Domain

Receiver function decomposition of OBC data: theory

“…Therefore, the seafloor interface effects should be taken into account during the wavefield decomposition. Here, we extend the method of Wang et al (2002), by including the hydrophone measurement in addition to the geophone recordings. This is necessary to separate the three incident wavefields.…”

“…The vertical slownesses for P and S waves are q α = α −2 − p 2 and q β = β −2 − p 2 , respectively. The expressions for the reflection-transmission coefficients at the solid-liquid interface can be derived from the Zoeppritz equation (Wang et al 2002)…”

“…The elastic decomposition is performed just below the oceanbottom level and aims at determining the upgoing P-and Swavefields at the receiver level. Some of the existing methods are based on polarization analysis (Cho & Spencer 1992;Wang et al 2002) or on the elastic wave equation formalism, where wavefields are expressed in terms of stress and potential. Applications of these decomposition methods have been discussed in Amundsen & Reitan (1995), Donati & Stewart (1996), Holvik & Amundsen (1998), Amundsen et al (1998), Soubaras (1998), Holvik et al Figure 1.…”