SYNOPSIS
PERL PROGRAM NAME:
AUTHOR: Juan Lorenzo (Perl module only)
DATE:
DESCRIPTION:
Version:
USE
NOTES
Examples
SYNOPSIS
SEISMIC UNIX NOTES SUSYNVXZ - SYNthetic seismograms of common offset V(X,Z) media via
Kirchhoff-style modeling
susynvxz >outfile [optional parameters]
Required Parameters:
<vfile file containing velocities v[nx][nz]
nx= number of x samples (2nd dimension)
nz= number of z samples (1st dimension)
Optional Parameters:
nxb=nx band centered at midpoint
nxd=1 skipped number of midponits
dx=100 x sampling interval (m)
fx=0.0 first x sample
dz=100 z sampling interval (m)
nt=101 number of time samples
dt=0.04 time sampling interval (sec)
ft=0.0 first time (sec)
nxo=1 number of offsets
dxo=50 offset sampling interval (m)
fxo=0.0 first offset (m)
nxm=101 number of midpoints
dxm=50 midpoint sampling interval (m)
fxm=0.0 first midpoint (m)
fpeak=0.2/dt peak frequency of symmetric Ricker wavelet (Hz)
ref="1:1,2;4,2" reflector(s): "amplitude:x1,z1;x2,z2;x3,z3;...
smooth=0 =1 for smooth (piecewise cubic spline) reflectors
ls=0 =1 for line source; default is point source
tmin=10.0*dt minimum time of interest (sec)
ndpfz=5 number of diffractors per Fresnel zone
verbose=0 =1 to print some useful information
Notes:
This algorithm is based on formula (58) in Geo. Pros. 34, 686-703,
by N. Bleistein.
Offsets are signed - may be positive or negative. ",
Traveltime and amplitude are calculated by finite differences which
is done only in part of midpoints; in the skiped midpoint, interpolation
is used to calculate traveltime and amplitude. ",
More than one ref (reflector) may be specified.
Note that reflectors are encoded as quoted strings, with an optional
reflector amplitude: preceding the x,z coordinates of each reflector.
Default amplitude is 1.0 if amplitude: part of the string is omitted.
CWP: Zhenyue Liu, 07/20/92
Many subroutines borrowed from Dave Hale's program: SUSYNLV
Trace header fields set: trid, counit, ns, dt, delrt,
tracl. tracr,
cdp, cdpt, d2, f2, offset, sx, gxUser'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 dt
sub dx
sub dxm
sub dxo
sub dz
sub fpeak
sub ft
sub fx
sub fxm
sub fxo
sub ls
sub ndpfz
sub nt
sub nx
sub nxb
sub nxd
sub nxm
sub nxo
sub nz
sub ref
sub smooth
sub tmin
sub verbose
sub get_max_index
max index = number of input variables -1