NAME

Vel - Make velocity model


SYNOPSIS

        Vel  >out.H pars


INPUT PARAMETERS

n1,n2,n3,o1,o2,o3
         Standard SEPlib
vc - real
      [2000.] Background velocity
hgrad- real
       [0.] Horizontal velocity gradient
slow - integer
      [0] velocity, 1-slowness
transp- integer
      [0] regular, 1-transpose axis 1 and 2
xa_ - real
      [o2] left edge of plane reflector
xb_ - real
      [o2+(n2-1)*d2] left edge of plane reflector
alfa_ - real
      [0.] dip in degress
z_ - real
      [o1+(n1-1)*d1] depth at xa
vr_ - real
      velocity below reflector
const_- integer
      [0] grad, 1= velocity is constant below reflector
smooth- real
      linear velocity under reflector from vr_ to smooth_
sin_period-real
       [10*d2] period of sinusoid
sin_amp- real
      amplitude of sinusoid
sin_vel_up-real
      [0.] velocity perturbation above reflector
sin_vel_down-real
      [0.] velocity perturbation below reflectr
sin_z_x0- real
      [o2] zero crossing of sine
sinz - real
      [-o1] depth at sin_z_x0
xan - real
      [0.] coordinate center of anomaly
zan - real
       [0.] coordinate center of anomaly
ranx - real
      [-1.] coordinate center of anomaly
ranz - real
       [-1.] coordinate center of anomaly
exan - real
      [1] sharpness of anomaly
rankx - real
       [-1.]  differential sharpness of in x
rankz - real
     [-1.]  differential sharpness of in z
exank - real
       [exan] differential sharpness of anomaly
widthan- real
      [1] scale width of anomaly
dvan - real
      [0] Maximum value of anomaly at (xan,zan)
dvank - real
      [dvan] For flat-topped anomalies


DESCRIPTION

        Makes velocity models in  2-D and 2.5-D
 (i.e. 2-D models replicated alonb the 3rd axis)


SEE ALSO

the Gauss manpage, the Spike manpage


CATEGORY

seis/model