Phase angle    Brightness      Error
(degree)  (arbitrary units) (arbit.units)
10		14.9		5.2
15		12.1		4.1
20		8.7		2.6
25		8.4		5.6
30		8.7		2.6
40		10.3		3.0
50		7.8		2.0
60		10.9		2.9
70		5.8		1.6
80		5.25		1.4
90		9.4		2.2
100		9.5		1.9
110		12.2		2.0
120		14.1		1.8
130		11.6		1.6
140		14.4		2.7
150		33.6		8.8
160		69.1		19.3
165		341.7		105.5