Program sfmig3 | 3-D Kirchhoff time migration with antialiasing. 
[SYNOPSIS]
sfmig3 < in.rsf hdr=head.rsf > mig.rsf n2= d2= o2= n3= d3= o3= n1= vel= antialias=
[PARAMETERS]
string  | antialias | = |   | 	antialiasing type [triangle,flat,steep,none] 
float   | d2 | = |   | 	
float   | d3 | = |   | 	
file    | hdr | = |   | 	auxiliary input file name
int     | n1 | = |   | 	
int     | n2 | = |   | 	
int     | n3 | = |   | 	
float   | o2 | = |   | 	
float   | o3 | = |   | 	
float   | vel | = |   | 	migration velocity 
[DIRECTORY]
user/fomels
