3D generalized nonhyperboloidal moveout approximation

Layered orthorhombic model

We also test the accuracy of the proposed approximation in a three-layer orthorhombic model over flat reflector with parameters (Layer 1-3) listed in Table 1. The thicknesses of the three layers are 0.25, 0.45, and 0.3 respectively. For previously proposed approximations, the effective coefficients are calculated, as the original authors suggested, by the VTI averaging relationship (Tsvankin and Thomsen, 1994; Hake et al., 1984). The reference rays for the proposed approximation (equation 1) were shot at and along -axis, at and along -axis, at and along , and at and along . The proposed generalized approximation performs with the highest accuracy (Figure 4).