Phase angle    Brightness      Error
(degree)  (arbitrary units) (arbit.units)
10		20.6		4.1
15		20.1		6.5
20		23.3		5.6
30		17.0		5.0
40		17.5		4.6
50		19.8		5.8
60		28.4		5.6
70		24.4		7.1
80		20.6		6.7
90		19.2		4.6
100		14.8		4.1
110		22.4		6.7
120		21.3		6.2
130		29.0		9.5
140		53.4		15.2
150		47.8		14.3