Program sfradial | Radial transform. 
[SYNOPSIS]
sfradial < in.rsf > out.rsf inv=n nw=2 tp=t0 xp=0. nv= vmin= vmax=
[PARAMETERS]
bool    | inv | =n |  [y/n] | 	if y, do inverse transform 
int     | nv | = |   | 	number of velocities (if inv=n) 
int     | nw | =2 |   | 	accuracy level 
float   | tp | =t0 |   | 	
float   | vmax | = |   | 	maximum velocity (if inv=n) 
float   | vmin | = |   | 	minimum velocity (if inv=n) 
float   | xp | =0. |   | 	
[DIRECTORY]
system/seismic
