1. Shanghai Institute of Technical Physics , Chinese Academy of Science
Lunar observation plan based on SI-traceable demonstration instrument development
Feng Jiang
Shanghai Institute of Technical Physics , Chinese Academy of Science
2017 Joint GSICS/IVOS Lunar Calibration Workshop

2. 2017 Joint GSICS/IVOS Lunar Calibration Workshop
1.Lunar observation plan introduction
2.Sensor calibration overview
3.Error budget analysis
4.On orbit calibration

3. Orbit parameters Moon Sun Spectrometer Altitude ~ 410Km Inclination
50°
Orbit period
92.7
minutes
Ground speed
7.23Km/s
Spectrometer

4. +X +Y +Z

5. XOY plane
-90°
-60°
-30° 0°
30°
60°
90°

7. Cryogenic Absolute Radiometer
Spectral range: 0.25~50μm
Absolute accuracy: <0.02%
Power resolution: 0.01nW
Key Laboratory of Optics Calibration and Characterization，
Chinese Academy of Science

8. Trap Detector

9. Spectral reponsivity

10. spatial non-uniformity
instability
polarization sensitivity
repeatability
linearity
laser power measurement

14. Absolue spectral response uncertainty of standard detector @632.8nm

15. Standard radiometer

16. Standard radiometer

17. Standard radiometer

19. Spectrometer calibration uncertainty
-Uncertainty of the standard radiometer
-Stability and spatial uniformity of the light source
-Wavelength calibration
-Polarization sensitivity
-Stray light
-Detector linearity
-Point spread function and line spread function
-Thermal

20. Pre-flight calibration
Integrating Sphere
Spectrometer
Tunable Laser
Standard radiometer

21. Polarization sensitivity
zigzag blazed grating

22. Birefringence index difference
Depolarizer
Clear Aperture
40mm
Wedge angle
12＇±2＇
Center thickness t1 /mm
3.5±0.01
Center thickness t2 /mm
3.53±0.01
Material
quartz crystal
Birefringence index difference
0.009

23. Cryogenic Absolute radiometer Spectrometer (VIS~NIR)
Error Budget
Cryogenic Absolute radiometer
Uncertainty ~0.02%
Si trap detector
Uncertainty ~0.15%
Spectrometer (VIS~NIR)
Uncertainty ~1.24%
Standard Radiometer
Uncertainty ~0.5%
激光均匀光源 稳定性
（Laser illuminated integrating sphere source）

24. On orbit calibration

25. On orbit calibration

26. On orbit calibration On orbit attenuator Ground
(Neutral density filter)

27. Thank you !