Program sfcconv | 1-D convolution with complex numbers. 
[SYNOPSIS]
sfcconv < in.rsf > out.rsf filt=filt.rsf single=y lag=1
[PARAMETERS]
file    | filt | = |   | 	auxiliary input file name
int     | lag | =1 |   | 	lag for internal convolution 
bool    | single | =y |  [y/n] | 	single channel or multichannel 
[DIRECTORY]
user/gee
