Program sformatrix | Lowrank decomposition for 3-D orthorhombic wave propagation. 
[SYNOPSIS]
sformatrix < velz.rsf fft=fft.rsf > middle.rsf app=app.rsf real=real.rsf seed=time(NULL eps=1.e-4 npk=20 xx1= xx2= xx3= dt=
[PARAMETERS]
file    | app | = |   | 	auxiliary output file name
        | dt | = |   | 	time step
        | eps | =1.e-4 |   | 	tolerance
file    | fft | = |   | 	auxiliary input file name
        | npk | =20 |   | 	maximum rank
file    | real | = |   | 	auxiliary output file name
        | seed | =time(NULL |   | 	
        | xx1 | = |   | 	x location
        | xx2 | = |   | 	x location
        | xx3 | = |   | 	x location
[DIRECTORY]
user/songxl
