Velan - Velocity analysis
Velan velopt=vel nv= dv= v0= nw= dw= w0= ng=all g0=0 dg=1 ntout=nt/10 dtout=(nt/ntout)*dt t0out=t0 tsmoo=2*dtout smute=2 < in.H > out.H
vel - scan over velocity (nv,dv,v0 required) slow - scan over slowness (nw,dw,w0 required)
number of velocities
sampling and first velocity
number pf slownesses
sampling and first slownesses
[all] number of gathers analyzed
[0] number of gathers to skip before beginning analysis
[1] increment between gathers analyzed
[nt/10] time-axis of out
[(nt/ntout)*dt] dtout must be an integer multiple of dt
[t0]first time to analyze
[2*dtout] length of temporal smoothing window
[2] samples for which nmo stretch exceeds smute are zeroed
standard seplib params
standard seplib params
standard seplib params
ntout
dtout
t0out
nv
dv
v0
ng midpoint axis
(input d3)*dg
(input o3) + g0*(input d3)
Velocity analysis of common-midpoint gathers
seis/velan