Program sfagmig | Angle-gather constant-velocity time migration. 
[SYNOPSIS]
sfagmig < in.rsf > out.rsf vel= ng= dg= g0= na=nx a=80.
[PARAMETERS]
float   | a | =80. |   | 	maximum dip angle 
float   | dg | = |   | 	reflection angle sampling 
float   | g0 | = |   | 	reflection angle origin 
int     | na | =nx |   | 	number of dip angles 
int     | ng | = |   | 	number of reflection angles 
float   | vel | = |   | 	velocity 
[DIRECTORY]
system/seismic
