Parameters
(1)  x+
(2)  y+
(3)  x-
(4)  y-


(   1) (   2) (   3) (   4) 

1.000  0.105  -0.013 -0.011 
0.105  1.000  0.019  -0.010 
-0.013 0.019  1.000  -0.125 
-0.011 -0.010 -0.125 1.000