Program sfwcorr | Stack a dataset over the second dimensions by SNR weighted method. 
[SYNOPSIS]
sfwcorr < in.rsf other=other.rsf > out.rsf w=50 eps=0
[PARAMETERS]
float   | eps | =0 |   | 	stable parameter
file    | other | = |   | 	auxiliary input file name
int     | w | =50 |   | 	size of window
[DIRECTORY]
user/gchliu
