NAME

Velan - Velocity analysis


SYNOPSIS

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


INPUT PARAMETERS

velopt - char*
      vel - scan over velocity (nv,dv,v0 required)
      slow - scan over slowness (nw,dw,w0 required)
nv - int
      number of velocities
dv,v0 - float
      sampling and first velocity
nw - int
      number pf slownesses
dw,w0 - float
      sampling and first slownesses
ng - int
      [all] number of gathers analyzed
g0 - int
      [0]   number of gathers to skip before beginning analysis
dg - int
      [1]   increment between gathers analyzed
ntout - int
      [nt/10]  time-axis of out
dtout - float
      [(nt/ntout)*dt] dtout must be an integer multiple of dt
t0out - float
      [t0]first time to analyze
tsmoo - float
      [2*dtout]  length of temporal smoothing window
smute - float
      [2] samples for which nmo stretch exceeds smute 
      are zeroed
n1,n2,n3-int
      standard seplib params
o1,o2,o3-float
      standard seplib params
d1,d2,d3-float
      standard seplib params


OUTPUT PARAMETERS

n1 - integer
      ntout
d1 - float
      dtout
o1 - float
      t0out
n2 - int
      nv
d2 - float
      dv
o2 - float
      v0
n3 - int
      ng midpoint axis
d3 - float
      (input d3)*dg
o3 - float
      (input o3) + g0*(input d3)


DESCRIPTION

Velocity analysis of common-midpoint gathers


SEE ALSO

the Velan3d manpage


CATEGORY

seis/velan