Phase angle    Brightness      Error
(degree)  (arbitrary units) (arbit.units)
10		37.8		8.0
20		26.9		6.4
30		33.8		7.9
40		23.4		6.1
50		33.8		4.4
60		28.8		5.5
70		18.3		4.0
80		18.8		4.0
90		24.4		5.7
100		20.8		6.2
110		29.4		8.3
120		38.9		10.6
130		45.5		10.0
140		54.2		14.1
150		58.1		16.1