REFERENCES

Alkhalifah, T., and Tsvankin, I., 1994, Velocity analysis for transversely isotropic media: Geophysics, 60, no. 5, 1550-1566.

Alkhalifah, T., Fomel, S., and Biondi, B., 1997, Time-domain anisotropic processing in arbitrarily inhomogeneous media: SEP-95, 77-99.

Alkhalifah, T., 1995, Efficient synthetic-seismogram generation in transversely isotropic, inhomogeneous media: Geophysics, 60, 1139-1150.

Alkhalifah, T., 1997a, An anisotropic Marmousi model: SEP-95, 265-282.

Alkhalifah, T., 1997b, Prestack time migration for anisotropic media: SEP-94, 263-298.

Biondi, B., and Palacharla, G., 1996, 3-D prestack depth migration of common-azimuth data: Geophysics, 61, 1822-1832.

Claerbout, J. F., 1985, Imaging the earth's interior: Blackwell Scientific Publications, Inc., 1, xiv-398.

Malcotti, H., and Biondi, B., 1998, Accurate linear interpolation in the extended split-step migration: SEP-97, 61-72.

Uzcategui, O., 1995, 2-D depth migration in transversely isotropic media using explicit operators: Geophysics, 60, no. 20, 780-806.

Versteeg, R. J., 1993, Sensitivity of prestack depth migration to the velocity model: Geophysics, 58, no. 6, 873-882.

 

SYNT
Figure 1 Anisotropic synthetic data: zero-offset data section. The velocity is represented by a strong vertical and lateral linear gradient of 0.5 s^-1.

 

SUNTZEROisomig
Figure 2 Extended split-step Zero-offset isotropic migration of the anisotropic synthetic data (Figure 1). In this case ${\eta=\epsilon=0.2}$ and ${\delta=0}$.

 

SUNTZEROANISOmig
Figure 3 Extended split-step zero-offset anisotropic migration of the synthetic data modeled with ${\eta=0.1}$ (Figure 1). In this case ${\eta=\epsilon=0.2}$ and ${\delta=0}$.

 

SYNTPRE
Figure 4 Extended split-step anisotropic prestack migration of the anisotropic synthetic data (Figure 1). This prestack imaged is obtained by using 5 reference velocities and constant ${\eta=0.2}$.

 

marmvel
Figure 5 Anisotropic synthetic data: Marmousi velocity model (focusing velocity) Alkhalifah (1997a); Versteeg (1993).

 

MAR15TIPRE
Figure 6 Anisotropic prestack depth migration using 5 reference velocities and 5 reference ${\eta}$'s.