Program sfshotprop | Shot propagation. 
[SYNOPSIS]
sfshotprop < in.rsf > out.rsf ns= ds= eps=0.1 positive=y
[PARAMETERS]
float   | ds | = |   | 	shot sampling 
float   | eps | =0.1 |   | 	regularization parameter 
int     | ns | = |   | 	number of shots 
bool    | positive | =y |  [y/n] | 	initial offset orientation 
[DIRECTORY]
system/seismic
