SUSYNLV - SYNthetic seismograms for Linear Velocity function
susynlv >outfile [optional parameters]
Optional Parameters:
nt=101 number of time samples
dt=0.04 time sampling interval (sec)
ft=0.0 first time (sec)
kilounits=1 input length units are km or kilo-feet
=0 for m or ft
Note: Output (sx,gx,offset) are always m or ft
nxo=1 number of source-receiver offsets
dxo=0.05 offset sampling interval (kilounits)
fxo=0.0 first offset (kilounits, see notes below)
xo=fxo,fxo+dxo,... array of offsets (use only for non-uniform offsets)
nxm=101 number of midpoints (see notes below)
dxm=0.05 midpoint sampling interval (kilounits)
fxm=0.0 first midpoint (kilounits)
nxs=101 number of shotpoints (see notes below)
dxs=0.05 shotpoint sampling interval (kilounits)
fxs=0.0 first shotpoint (kilounits)
x0=0.0 distance x at which v00 is specified
z0=0.0 depth z at which v00 is specified
v00=2.0 velocity at x0,z0 (kilounits/sec)
dvdx=0.0 derivative of velocity with distance x (dv/dx)
dvdz=0.0 derivative of velocity with depth z (dv/dz)
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
er=0 =1 for exploding reflector amplitudes
ls=0 =1 for line source; default is point source
ob=1 =1 to include obliquity factors
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:
Offsets are signed - may be positive or negative. Receiver locations
are computed by adding the signed offset to the source location.
Specify either midpoint sampling or shotpoint sampling, but not both.
If neither is specified, the default is the midpoint sampling above.
More than one ref (reflector) may be specified. Do this by putting
additional ref= entries on the commandline. When obliquity factors
are included, then only the left side of each reflector (as the x,z
reflector coordinates are traversed) is reflecting. For example, if x
coordinates increase, then the top side of a reflector is reflecting.
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.
Credits: CWP Dave Hale, 09/17/91, Colorado School of Mines
UTulsa Chris Liner 5/22/03 added kilounits flag
Trace header fields set: trid, counit, ns, dt, delrt,
tracl. tracr, fldr, tracf,
cdp, cdpt, d2, f2, offset, sx, gx