Program sfcfftexp2 | 2-D FFT-based zero-offset exploding reflector modeling/migration  
[SYNOPSIS]
sfcfftexp2 < data.rsf > image.rsf left=left.rsf right=right.rsf mig=n pad1=1 nz= dz= nt= dt=
[PARAMETERS]
float   | dt | = |   | 	time sampling (if modeling) 
float   | dz | = |   | 	depth sampling (if migration) 
file    | left | = |   | 	auxiliary input file name
bool    | mig | =n |  [y/n] | 	if n, modeling; if y, migration 
int     | nt | = |   | 	time samples (if modeling) 
int     | nz | = |   | 	depth samples (if migration) 
int     | pad1 | =1 |   | 	padding factor on the first axis 
file    | right | = |   | 	auxiliary input file name
[DIRECTORY]
user/jsun
