SYNOPSIS
PERL PROGRAM NAME:
AUTHOR: Juan Lorenzo (Perl module only)
DATE:
DESCRIPTION:
Version:
USE
NOTES
Examples
SYNOPSIS
SEISMIC UNIX NOTES SUMIGGBZO - MIGration via Gaussian Beams of Zero-Offset SU data
sumiggbzo <infile >outfile vfile= nz= [optional parameters]
Required Parameters:
vfile= name of file containing v(z,x)
nz= number of depth samples
Optional Parameters:
dt=from header time sampling interval
dx=from header(d2) or 1.0 spatial sampling interval
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 =0 silent; =1 chatty
Note: spatial units of v(z,x) must be the same as those of dx.
v(z,x) is represented numerically in C-style binary floats v[x][z],
where the depth direction is the fast direction in the data. Such
models can be created with unif2 or makevel. (In C v[iz][ix] denotes a v(x,z) array, whereas v[ix][iz]
denotes a v(z,x) array, the opposite of what Matlab and Fortran
programmers may expect.) ",
Caveat:
In the event of a "Segmentation Violation" try reducing the value of
the "bwh" parameter. Run program with verbose=1 do see the default
value.
Credits:
CWP: Dave Hale (algorithm), Jack K. Cohen, and John Stockwell
(reformatting for SU)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 amax
sub amin
sub bwh
sub dt
sub dx
sub dz
sub fmax
sub fmin
sub nz
sub verbose
sub vfile
sub get_max_index
max index = number of input variables -1