1. Changchun Institute of Optics Fine Mechanics and Physics
The technology of a new generation
Utraviolet hyperspectral
for detecting global ozone profile
Changchun Institute of Optics Fine Mechanics and Physics

2. Earth nadir and limb detecting technology Calibration for payload
Content
Earth nadir and limb detecting technology
UV hyperspectral for detecting ozone profile
Calibration for payload

3. Earth nadir and limb detecting technology for UV
Nadir observation
Nadir viewing measurements should be used to retrieve total column amounts with high horizontal resolution.
Limb observation
Limb viewing measurements is particularly suited for the retrieval of profiles with high
vertical spatial resolution .

4. Nadir observation instrument
Wavelength band：160 nm nm
Wavelength accuracy: 0.02nm
Wavelength repeatability：0.035nm
Calibration accuracy：3%（relative）
Dynamic range：10E5
Stray light：10E-5
SUBS on FY-3 A、B 、C satellite launched
in 2007、2010、2012
FY-3 B The projection figure of the ozone in the South Pole for different height layers
The projection figure of the ozone in the South
Pole measured by FY-3B satellite in 2008

5. UV hyperspectral for detecting ozone profile

6. 2. UV hyperspectral for detecting ozone profile
In order to obtain the ozone profile of atmosphere compos- ition and other composition , the observation wavelength is covered from 250nm to 500nm.
Composition
Wavelength
Height
Bandwidth
Characteristics O3 nm
35-70 km
< 1 nm
absorbed O
297.3 nm km
< 0.4 nm
emitted OH
308 nm
60-90 km
NO2 nm
15-40 km
< 0.7 nm

7. UV hyperspectral for detecting ozone profile
The high spectral resolution (0.4 nm to 0.6 nm), It is a passive remote sensi-ng spectrometer detecting light in the wavelength range from nm to 500nm.
Three view
Nadir : ±36°
Limb : ±10°
Sun calibration : 18°×18°

8. UV hyperspectral for detecting ozone profile
This spectral range is divided into three channels, the high S/N values of this instrument allows the measurement for a wide range of ozone.
The payload has a two-mirror scan system, allowing nadir and limb scans.
The payload has different optical efficiencies for different polarization orientations of incoming radiation.

9. Spatial coverage
Nadir light
ESM
Limb light
ASM
ESM

10. Calibration for payload

11. Calibration on orbit Radiation Spectrum
Monitor the degradation of optical systems
Diffuser
Scanning mirror (ASM and ESM)
Spectrometer
Spectrum
Spectrum position
The calibration wheel

12. Calibration on the ground
Mercury lamp
Spectrum Calibration
Wavelength calibration
The Wavelength of Mercury lamp
Atmospheric
Wavelength
Vacuum
wavelength
Intensity
Type /
1000 Ⅰ
400
15000
320
250
320.82 Ⅱ
100
150
2800
750
300
1200
1800
120
4000

13. Calibration on the ground
Spectrum Calibration
Spectral calibration device
Spectral calibration procedure

14. Calibration on the ground UV-VIS integral sphere
Radiation Calibration
UV-VIS integral sphere
Radiance calibration
Spectral radiance response degree calibration
Calibration instrument : UV-VIS integral sphere
Standard diffuser
Standard spectral radiometer
Standard quartz halogen tungsten lamp

15. Calibration on the ground
Radiation Calibration
Spectral irradiance response degree calibration
Calibration instrument : Standard quartz halogen tungsten lamp
Standard xenon lamp
Standard diffuser
Scanning system azimuth calibration
Difference of radiation responsiveness due to
difference of the incident angle.
Calibration instrument : UV collimator
Light source
Revolving stage

16. UV hyperspectral for detecting ozone profile
moderately high spectral resolution
high radiometric accuracy
high spectral stability
high dynamic range
high signal-to-noise

17. UV hyperspectral for detecting ozone profile
Nadir
Limb
Object
O3 profile
O3、NO2、SO2
Wavelength
250~310nm nm
Spectral Resolution
Nadir
Limb
Observation
Spatial Resolution
34  60 km
3 km
IFOV
2.3 º × º
Nadir
Limb
Dynamic Range
105
Calibration Accuracy 2%
Stray Light
10-5

18. Polarization

19. Thanks !