Program sfs2ofz2 | Analytical plane-wave traveltime in a linear slowness squared model. 
[SYNOPSIS]
sfs2ofz2 > out.rsf n= gz=-6. gx=2. v0=4
[PARAMETERS]
float   | gx | =2. |   | 	slowness squared gradient 
float   | gz | =-6. |   | 	
int     | n | = |   | 	number of samples 
float   | v0 | =4 |   | 	initial slowness squared 
[DIRECTORY]
system/seismic
