Program sfoway1 | Oriented one-way wave equation. 
[SYNOPSIS]
sfoway1 < in.rsf > out.rsf velocity=vel.rsf vgrad=vgrad.rsf eps=0.1 lagrange=n
[COMMENTS]

Axis order: x, p, t

[PARAMETERS]
float   | eps | =0.1 |   | 	stretch regularization 
bool    | lagrange | =n |  [y/n] | 	Use Lagrangian method 
file    | velocity | = |   | 	auxiliary input file name
file    | vgrad | = |   | 	auxiliary input file name
[DIRECTORY]
system/seismic
