Program sfdivnls | 2D divn by stationary LS 
[SYNOPSIS]
sfdivnls < inp.rsf den=den.rsf > out.rsf rect1=0 rect2=0 rect3=0 tls=n angle=n
[PARAMETERS]
bool    | angle | =n |  [y/n] | 	angle or slope 
file    | den | = |   | 	auxiliary input file name
int     | rect1 | =0 |   | 	
int     | rect2 | =0 |   | 	
int     | rect3 | =0 |   | 	smoothing radius 
bool    | tls | =n |  [y/n] | 	total least squares 
[DIRECTORY]
user/chen
