
TY  - JOUR
A1  - Amano, H. 
A1  - Ohta, Y. 
T1  - Separation of P waves and S waves in the VSP wavefield on the basis of a forward modelling technique
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 1991
VL  - 22
IS  - 1
SP  - 1
EP  - 4
KW  - 
UR  - https://doi.org/10.1071/EG991001 
N2  - Separation of P waves and S waves in the VSP wavefield is proposed on the basis of a synthetic forward modelling technique. The weak wavefield masked by dominant wave trains can be extracted with this method. The decomposed wavefield is expressed in frequency-depth (f-z) domain as a linear combination of up to third order differential of traces, which is approximated by trace differences in the practical separation process. In general, five traces with single-component data are required in this process, but the same process is implemented with only three traces in the acoustic case. Two-trace extrapolation is applied to each edge of data gather in order to enhance the accuracy of trace difference. Since the formula is developed in f-z domain, the influence of anelasticity is taken into account with simplicity and the calculation is fast enough with the benefit of the fast Fourier transform (FFT). 
ER  -

