Program sfradonoper | Linear Radon operator. 
[SYNOPSIS]
sfradonoper < in.rsf > out.rsf adj=y verb=n np= dp= p0= nx= ox= dx= parab=n x0=1.
[PARAMETERS]
bool    | adj | =y |  [y/n] | 	if y, perform adjoint operation 
float   | dp | = |   | 	p sampling (if adj=y) 
float   | dx | = |   | 	
int     | np | = |   | 	number of p values (if adj=y) 
int     | nx | = |   | 	number of offsets (if adj=n) 
float   | ox | = |   | 	
float   | p0 | = |   | 	p origin (if adj=y) 
bool    | parab | =n |  [y/n] | 	if y, parabolic Radon transform 
bool    | verb | =n |  [y/n] | 	verbosity flag 
float   | x0 | =1. |   | 	reference offset 
[DIRECTORY]
user/yliu
