Program sfs2ofz | Analytical point-source traveltime in a linear slowness squared model. 
[SYNOPSIS]
sfs2ofz > out.rsf n= g=-6. v0=4 s=0.5
[PARAMETERS]
float   | g | =-6. |   | 	slowness squared gradient 
int     | n | = |   | 	number of samples 
float   | s | =0.5 |   | 	shot location at the surface 
float   | v0 | =4 |   | 	initial slowness squared 
[DIRECTORY]
system/seismic
