Program sfprestolt | Prestack Stolt modeling/migration. 
[SYNOPSIS]
sfprestolt < in.rsf > out.rsf inv=n depth=n stack=y nh= dh= vel= pad=nt extend=4
[PARAMETERS]
bool    | depth | =n |  [y/n] | 	y: depth migration, n: time migration 
float   | dh | = |   | 	offset sampling 
int     | extend | =4 |   | 	trace extension 
bool    | inv | =n |  [y/n] | 	y: modeling, n: migration 
int     | nh | = |   | 	number of offsets 
int     | pad | =nt |   | 	padding on the time axis 
bool    | stack | =y |  [y/n] | 	if y: stack migrated image 
float   | vel | = |   | 	constant velocity 
[DIRECTORY]
system/seismic
