SYNOPSIS
PERL PROGRAM NAME:
AUTHOR: Juan Lorenzo (Perl module only)
DATE:
DESCRIPTION:
Version:
USE
NOTES
Examples
SYNOPSIS
SEISMIC UNIX NOTES SUMIGGBZOAN - MIGration via Gaussian beams ANisotropic media (P-wave)
sumiggbzoan <infile >outfile vfile= nt= nx= nz= [optional parameters]
Required Parameters:
a3333file= name of file containing a3333(x,z)
nx= number of inline samples (traces)
nz= number of depth samples
Optional Parameters:
dt=tr.dt time sampling interval
dx=tr.d2 inline sampling interval (trace spacing)
dz=1.0 depth sampling interval
fmin=0.025/dt minimum frequency
fmax=10*fmin maximum frequency
amin=-amax minimum emergence angle; must be > -90 degrees
amax=60 maximum emergence angle; must be < 90 degrees
bwh=0.5*vavg/fmin beam half-width; vavg denotes average velocity
verbose=0 silent, =1 chatty
Files for general anisotropic parameters confined to a vertical plane:
a1111file= name of file containing a1111(x,z)
a1133file= name of file containing a1133(x,z)
a1313file= name of file containing a1313(x,z)
a1113file= name of file containing a1113(x,z)
a3313file= name of file containing a3313(x,z)
For transversely isotropic media Thomsen's parameters could be used:
deltafile= name of file containing delta(x,z)
epsilonfile= name of file containing epsilon(x,z)
a1313file= name of file containing a1313(x,z)
if anisotropy parameters are not given the program considers ",
the medium to be isotropic.
Credits:
CWP: Tariq Alkhalifah, based on MIGGBZO by Dave Hale
CWP: repackaged as an SU program by John Stockwell, April 2006
Technical Reference:
Alkhailfah, T., 1993, Gaussian beam migration for
anisotropic media: submitted to Geophysics.
Cerveny, V., 1972, Seismic rays and ray intensities
in inhomogeneous anisotropic media:
Geophys. J. R. Astr. Soc., 29, 1--13.
Hale, D., 1992, Migration by the Kirchhoff,
slant stack, and Gaussian beam methods:
CWP,1992 Report 121, Colorado School of Mines.
Hale, D., 1992, Computational Aspects of Gaussian
Beam migration:
CWP,1992 Report 121, Colorado School of Mines.User's notes (Juan Lorenzo) untested
CHANGES and their DATES
Import packages
instantiation of packages
Encapsulated hash of private variables
sub Step
collects switches and assembles bash instructions by adding the program name
sub note
collects switches and assembles bash instructions by adding the program name
sub clear
sub a1111file
sub a1113file
sub a1133file
sub a1313file
sub a3313file
sub a3333file
sub amax
sub amin
sub bwh
sub deltafile
sub dt
sub dx
sub dz
sub epsilonfile
sub fmax
sub fmin
sub nx
sub nz
sub verbose
sub vfile
sub get_max_index
max index = number of input variables -1