Program sfve2d | Convert interval velocity to Dix velocity 
[SYNOPSIS]
sfve2d < fsc.rsf > fid.rsf x=fx.rsf z=fy.rsf nt= dt= order=4
[PARAMETERS]
float   | dt | = |   | 	
int     | nt | = |   | 	
int     | order | =4 |   | 	interpolation order 
file    | x | = |   | 	auxiliary output file name
file    | z | = |   | 	auxiliary output file name
[DIRECTORY]
user/kourkina
