Fig. 1. High-precision point light source system. (a) Structural diagram; (b) physical map

Fig. 2. Sun sensor

Fig. 3. Relationships among coordinate systems of point light source systems. (a) Relationship between camera coordinate system and reflector coordinate system; (b) relationship between camera coordinate system and pitch coordinate system; (c) relationship between pitch coordinate system and azimuth coordinate system; (d) relationship between azimuth coordinate system and local coordinate system

Fig. 4. Flow chart of algorithm

Table 1. Partial test data of No.1 machine

Table 2. Test results of three instruments