Fig. 1. Actual image of Lageos-1

Fig. 2. Reflection intensity distribution of retroreflectors in Lageos-1 with the incident angle from the north pole of satellite. (a) CoM model; (b) RUD model; (c) experiment results^[12]

Fig. 3. Retroreflectors distribution at 70.151° latitude inLageos-1

Fig. 4. Reflected intensity of each retroreflector at 70.151° latitude in Lageos-1 with the incident angle from the north pole of satellite. (a) CoM model; (b) RUD model

Fig. 5. Reflected intensity distribution in Lageos-1 with different laser incident angles simulated by RUD model. (a) (0°,67.5°); (b) (0°,45°); (c) (0°,22.5°); (d) (0°,0°)

Fig. 6. Echo signal residual distributions of Lageos-1 in SLR. (a) CoM model; (b) RUD model; (c)(d) experiment results obtained at Changchun observation

Fig. 7. CoM curves of Lageos-1 with changing of the laser incident angle from (0°,0°) to (0°,90°) simulated by RUD model