Program sfisaac0 | Zero-offset bending ray tracing in one-layered media
[SYNOPSIS]
sfisaac0 < refl.rsf > ttime.rsf xrefl=xrefl.rsf ns=nr ds=dr s0=r0 order=3 velocity=2.0 tol=0.0001/velocity
[PARAMETERS]
float   | ds | =dr |   | 	source sampling 
int     | ns | =nr |   | 	Number of sources 
int     | order | =3 |   | 	interpolation order 
float   | s0 | =r0 |   | 	source origin 
float   | tol | =0.0001/velocity |   | 	assign a default value for tolerance
float   | velocity | =2.0 |   | 	assign velocity km/s
file    | xrefl | = |   | 	auxiliary output file name
[DIRECTORY]
user/zone
