Phase angle Polarization Error (degree) (%) (%) 15 6.6 4.0 20 8.5 2.8 25 8.9 2.9 30 9.0 2.4 40 13.8 3.4 50 22.6 3.8 60 28.9 3.0 70 36.8 3.8 80 40.0 5.0 90 44.3 5.0 100 37.8 5.0 110 27.4 4.3 120 18.6 4.1 130 14.1 4.2 140 9.0 3.3 150 5.6 3.0 160 6.4 2.9 165 4.5 2.9