Fig. 1. The relationship between the white, the ecliptic and the earth's equator
Fig. 2. Diagram of lunar phase
Fig. 3. The diagram of lunar phase angle
Fig. 4. The curve diagram of lunar phase angle of hyperspectral observation satellite throughout the year
Fig. 5. Satellite-moon vector diagram
Fig. 6. Geometric relationship diagram of rolling attitude maneuver to the moon
Fig. 7. Schematic diagram of rolling attitude maneuvering lunar calibration window
Fig. 8. Angle between earth-moon vector and satellite orbital plane
Fig. 9. Geometric relationship diagram of pitch attitude maneuver to the moon
Fig. 10. Lunar calibration observation window and maneuvering angle
Fig. 11. Attitude angle
Fig. 12. Attitude angle velocity
Fig. 13. The angle between star sensor optical axis vector and the sun vector
Fig. 14. The illumination angle of the nightside during attitude maneuver
Fig. 15. The illumination angle of solar panel during attitude maneuver
Fig. 16. Lunar calibration timing chart
Rolling attitude maneuver angle/(°) | Beta angle/(°) | Lunar phase angle in light area/(°) | Lunar phase angle in shadow area/(°) |
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-62.3 | 22.5 | -39.8 | -95.2 | -64.2 | 22.5 | -41.7 | -93.3 | -66.63 | 22.5 | -44.13 | -90.87 | -67 | 22.5 | -44.5 | -90.5 | -70 | 22.5 | -47.5 | -87.5 | 62.3 | 22.5 | 84.8 | 140.2 | 64.2 | 22.5 | 86.7 | 138.3 | 66.63 | 22.5 | 89.13 | 135.87 | 67 | 22.5 | 89.5 | 135.5 | 70 | 22.5 | 92.5 | 132.5 |
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Table 1. Lunar phase angle under different rolling maneuver angles
Satellite external surface | Normal external heat/W | External heat during lunar calibration/W | Change/% |
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Propelling module floor | 150.9 | 150.0 | -0.61 | Propelling module III quadrant side plate | 49.2 | 51.8 | 5.29 | Propelling module IV quadrant side plate | 22.0 | 23.0 | 4.53 | Service module I quadrant side plate | 77.8 | 70.7 | -9.01 | Service module III quadrant side plate | 135.6 | 142.4 | 5.00 | Service module IV quadrant side plate | 90.8 | 94.9 | 4.52 | Payload module III quadrant side plate | 39.8 | 41.8 | 5.03 | Payload module IV quadrant side plate | 89.7 | 93.8 | 4.57 | Sum | 684.6 | 698.6 | 2.04 |
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Table 2. External heat curve of the satellite