Phase angle    Brightness      Error
(degree)  (arbitrary units) (arbit.units)
15		47.6		12.3
20		31.2		7.8
25		57.3		12.8
30		18.5		5.7
40		16.0		4.0
50		29.3		10.8
60		19.8		5.2
70		11.3		3.0
80		6.6		1.7
90		6.4		1.4
100		5.5		1.2
110		7.27		1.6
120		4.5		1.0
130		6.7		1.7
140		16.8		4.4
150		37.6		10.2
160		59.6		14.9