Phase angle    Brightness      Error
(degree)  (arbitrary units) (arbit.units)
10		3.1		1.1
12		6.0		1.9
15		23.2		5.7
17		17.		4.0
20		9.8		2.4
25		4.5		1.1
30		23.3		5.4
40		12.2		2.7
50		13.8		2.9
60		7.3		1.7
70		4.4		0.8
80		4.5		0.9
90		4.4		0.7
100		6.5		1.0
110		5.0		0.5
120		5.1		0.5
130		1.6		0.2
140		1.8		0.4
150		5.1		1.4
160		32.4		12.9