Table 1: Angle estimation.

CasesIncident angle Measured angleMax error

150°50°
2−10°40°−9.8°41.8°1.8°
3−20°30°−19.6°31.4°1.4°
4−30°20°−29.1°20.4°0.9°
5−40°10°−38.1°10.4°1.9°