Program sfst | S transform 
[SYNOPSIS]
sfst < in.rsf > out.rsf inv=n flo= fhi=
[PARAMETERS]
float   | fhi | = |   | 	High frequency in band, default is Nyquist 
float   | flo | = |   | 	Low frequency in band, default is 0 
bool    | inv | =n |  [y/n] | 	if y, do inverse transform 
[DIRECTORY]
user/yliu
