θ | 90˚ | 80˚ | 70˚ | 60˚ | 50˚ | 40˚ | 30˚ | 20˚ | 10˚ | 5˚ |
f | 0.972 | 0.970 | 0.985 | 0.985 | 0.940 | 0.974 | 0.967 | 0.968 | 0.892 | 0.866 |