Program sfadjgradient2d | Gradient adjoint-state calculation for image-domain WET 
[SYNOPSIS]
sfadjgradient2d < Fvel.rsf xig=Fxig.rsf swf=Fswf.rsf rwf=Frwf.rsf > Fgrd.rsf nxtap=40 verbose=n
[PARAMETERS]
int     | nxtap | =40 |   | 	TAPER size 
file    | rwf | = |   | 	auxiliary input file name
file    | swf | = |   | 	auxiliary input file name
bool    | verbose | =n |  [y/n] | 	VERBOSITY flag 
file    | xig | = |   | 	auxiliary input file name
[DIRECTORY]
user/jeff
