Program sffacttieikonal | Fast sweeping factored TTI eikonal solver (2D) 
[SYNOPSIS]
sffacttieikonal < vzf.rsf > time.rsf niter=4 nfpi=3 fac=1 optloc=n zshot=0. yshot=o2 + 0.5*(n2-1)*d2 epsilon= delta= theta= shotfile=
[PARAMETERS]
string  | delta | = |   | 	
string  | epsilon | = |   | 	
int     | fac | =1 |   | 	Type of factorization: (0)Additive, (1)Multiplicative 
int     | nfpi | =3 |   | 	number of fixed-point iterations 
int     | niter | =4 |   | 	number of sweeping iterations 
bool    | optloc | =n |  [y/n] | 	Selects optimal location for homogeneous medium parameter 
string  | shotfile | = |   | 	File with shot locations (n2=number of shots, n1=3) 
string  | theta | = |   | 	
float   | yshot | =o2 + 0.5*(n2-1)*d2 |   | 	
float   | zshot | =0. |   | 	Shot location (used if no shotfile) 
[DIRECTORY]
user/uwaheed
