Jianwen Hua1, Zhanhu Wang1, Juan Duan1, Libing Li1..., Chenjun Zhang1, Xiaowei Wu1,*, Qing Fan1, Ren Chen1, Xiaojie Sun1, Lianwei Zhao1, Qian Guo1, Lei Ding2, Liwei Sun3, Changpei Han3, Xiangyang Li4, Nili Wang4, Haimei Gong4, Xiaoning Hu5, Qingjun Liao5, Dingquan Liu6, Tianyan Yu6, Yinong Wu7, Enguang Liu7 and Zhijiang Zeng8|Show fewer author(s)
Author Affiliations
1Center of Interferometer R&D, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200082, China2Key Laboratory of Infrared System Detection and Imaging Technology, Chinese Academy of Sciences, Shanghai 200082, China3Third Engineering Department, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200082, China4Infrared Imaging Material and Device Laboratory, Chinese Academy of Sciences, Shanghai 200082, China5Key Laboratory of Infrared Imaging Materials and Detectors, Chinese Academy of Sciences, Shanghai 200082, China6Department of Optical Coatings and Materials, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200082, China7Space Cryocooler System Laboratory, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200082, China8State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Shanghai 200082, Chinashow less
DOI: 10.3788/COL201816.111203
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Jianwen Hua, Zhanhu Wang, Juan Duan, Libing Li, Chenjun Zhang, Xiaowei Wu, Qing Fan, Ren Chen, Xiaojie Sun, Lianwei Zhao, Qian Guo, Lei Ding, Liwei Sun, Changpei Han, Xiangyang Li, Nili Wang, Haimei Gong, Xiaoning Hu, Qingjun Liao, Dingquan Liu, Tianyan Yu, Yinong Wu, Enguang Liu, Zhijiang Zeng, "Review of Geostationary Interferometric Infrared Sounder," Chin. Opt. Lett. 16, 111203 (2018)
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Fig. 1. Technical design on GIIRS of the FY-4 satellite.
Fig. 2. (a) Mechanical assembly drawing and (b) interferometer product.
Fig. 3. Interferogram of a narrowband light source.
Fig. 4. Interferogram of a hot blackbody.
Fig. 5. Detector assemblies: (a) long-wavelength detector assembly (8.85–14.3 μm) and (b) medium-wavelength detector assembly (4.44–6.06 μm).
Fig. 6. Cryocooler of GIIRS.
Fig. 7. Radiant cooler.
Fig. 8. A conceptual optical system for GIIRS.
Fig. 9. Configuration of the main box.
Fig. 10. Electronic system.
Fig. 11. Calibration system.
Fig. 12. Calibration system entering vacuum tank.
Fig. 13. Instrument line shape (ILS) of long-wavelength detector.
Fig. 14. ILS of mid-wavelength detector.
Fig. 15. Mid-wavelength calibration with CO gas.
Fig. 16. Long-wavelength calibration with NH3 gas.
Fig. 17. Interferograms obtained by pointing the scanning mirror at a blackbody.
Fig. 18. Spectral response curve of 128 elements.
Fig. 19. Interferograms obtained by pointing the scanning mirror at a blackbody.
Fig. 20. Spectral response curves of 128 elements.
Fig. 21. Atmospheric spectrum sounded in-orbit: (a) long wavelength and (b) mid-wavelength.
Fig. 22. Interferograms and spectra obtained from different regions: A, India area; B, high latitude of southern hemisphere; C, China area; D, low latitude of northern hemisphere. Sample A indicates relative warm and humid clear atmosphere. Samples B and D represent dry and cold atmospheres. Sample C shows the typical sky.
Fig. 23. Vertical distribution of temperature.
| Working mode | Performance criterion |
|---|
| Full-disk view of earth | To finish a full-disk view of earth by using the scanning system. View angle coverage is | | Regional sounding | To observe a specific area by using a designed progressive scan | | Sunlight-avoidance sounding | Sunlight may impact the calibration accuracy and the imaging quality of the instrument during eclipse periods. To finish the observation of a given area on the basis of a specific detection mode to avoid these effects | | Star tracking | To observe fixed stars by rotating the scanning mirror, the coverage angle is 22.2°, and the brightness is not less than 6.5 | | Blackbody view | To observe a blackbody by rotating the scanning mirror for implementation of radiation calibration | | Deep space view | To observe deep space in specific time intervals according to the different requirements for determining the infrared background | | Spectrum calibration | To observe clear atmosphere when pointing to a specific area according to the instructions for spectrum calibration | | Orientation | Rapidly pointing to a given position |
|
Table 1. Typical Working Mode
| Parameter | Performance |
|---|
| Cooling capability | 2 W@60 K (testing environment: ) | | Input power | W AC | | Vibration force of expander | | | Cooling down time | | | Mass | | | Operating temperature | | | Lifetime | Designed for 7 years |
|
Table 2. Performance Characteristics of FY-4 Cryocooler
| Parameter | Performance |
|---|
| Working temperature of aft optics | | | Performance of radiant cooler | 9.4 W@180 K | | Heat transfer capability of low temperature heat pipe | 10 W@180 K | | Temperature difference for heat transfer of low temperature heat pipe | (testing at 8 W@180 K) |
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Table 3. Performance Characteristics of Radiant Cooler
| Circuit module name | Function description |
|---|
| Data processing and management | Measurement and management of the instrument, information acquisition, and data transmission | | GIIRS controller | Control of interferometer electronics and scanning system | | Mechanical cryocooler controller | Control of operation for cryocooler | | Temperature controller | Measurement and control of temperature in the main box | | Chokes | Stabilizing current of cryocooler | | Preamplifier circuit of long wave | Amplification of long-wave signal | | Preamplifier circuit of mid wave | Amplification of mid-wave signal | | Preamplifier circuit of visible light | Amplification of visible light signal | | Preamplifier circuit of the inductosyn | Data acquisition and processing for the inductosyn | | Laser controller | Control of laser operation | | Preamplifier circuit of laser | Amplification of laser signal |
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Table 4. Circuit Modules
| Parameter | Performance |
|---|
| Spectral bandwidth () | Long wave: 700–1130 |
|---|
| Mid wave: 1650–2250 |
|---|
| Spectral resolution () | 0.625 | | Noise equivalent Radiance [W/(M2·cm−1·rad)] | Long wave | | Mid wave | | Spatial resolution (km) | 16 | | Time resolution (min) | 67 (China) |
|
Table 5. Performance of GIIRS In-orbit
| | Spectral resolution | Detector size | Frequency of observation (approx. times per day) |
|---|
| CrIS | | 9 | 4 | | IASI | | 4 | 4 | | GIIRS | | | (China area) |
|
Table 6. Main Characteristics of CrIS, IASI, and GIIRS
