Journal of Infrared and Millimeter Waves, Volume. 40, Issue 2, 214(2021)
High precision on-orbit spectral calibration of atmospheric infrared ultra-spectral sounder
Figures & Tables(14)
Fig. 1. Schematic diagram of AIUS on-orbit solar occultation observation
Fig. 3. The influence of Doppler shift on spectrum at 1 805.14 cm-1 microwindow for H2O
Fig. 4. Accurate position of spectral peak determined by Gaussian fitting
Fig. 5. Regression relation between data point number and wave number of spectral peak in the AIUS two channels
Fig. 6. Comparison of the observed and theoretical atmospheric transmittance curves before and after the first on-orbit spectral calibration
Fig. 7. Comparison of the observed and theoretical atmospheric transmittance curves after the second on-orbit spectral calibration
Table 1. Main technological indexes of AIUS
View tableView in ArticleTable 1. Main technological indexes of AIUS
项目 指标 分光类型 干涉傅里叶变换 光谱范围 2.4~13.3 μm（752~4 167 cm-1） 光谱分辨率 0.03 cm-1 动态范围 800~5 800 K 信噪比 ＞100（在等效5 800 K黑体辐射时） 视场角 1.25 mrad 太阳跟踪稳定度 35 μrad 量化位数 18 bit 探测器 InSb：2.4~5.4 μm；MCT：5.4~13.3 μm 扫描周期 2 s
Table 2. Reference lines of MCT channel
View tableView in ArticleTable 2. Reference lines of MCT channel
序号 波数值/cm-1 序号 波数值/cm-1 1 947.74 11 1 481.24 2 952.88 12 1 531.64 3 957.80 13 1 548.12 4 1233.455 14 1 572.928 5 1386.481 15 1 672.475 6 1395.803 16 1 751.423 7 1404.98 17 1 758.581 8 1429.945 18 1 779.112 9 1446.478 19 1 799.616 10 1455.30 20 1 805.146
Table 3. Reference lines of InSb channel
View tableView in ArticleTable 3. Reference lines of InSb channel
序号 波数值/cm-1 序号 波数/cm-1 序号 波数值/cm-1 1 1 866.38 12 2 847.72 23 3 313.26 2 1 884.56 13 2 849.34 24 3 397.22 3 1 895.20 14 2 901.88 25 3 442.5 4 1 927.80 15 2 904.52 26 3 774.053 5 1 945.34 16 3 064.404 27 3 777.94 6 1 967.44 17 3 101.16 28 3 929.36 7 1 998.92 18 3 142.78 29 3 973.92 8 2 135.54 19 3 185.26 30 3 995.00 9 2 139.42 20 3 209.74 31 4 008.58 10 2 493.88 21 3 254.148 32 4 043.78 11 2 494.76 22 3 288.48 33 4 075.30
Table 4. Doppler shift in the AIUS two channels when on orbit
View tableView in ArticleTable 4. Doppler shift in the AIUS two channels when on orbit
通道 波长范围
/μm
波数范围
/cm-1
多普勒频移量
/cm-1
InSb 2.4~5.4 1 852~4 167 0.040 4~0.090 9 MCT 5.4~13.3 752~1 852 0.016 4~0.040 4
Table 5. Spectral calibration coefficient of the two AIUS channels
View tableView in ArticleTable 5. Spectral calibration coefficient of the two AIUS channels
通道 a b MCT 0.019 835 39 -0.007 740 703 2 InSb 0.019 835 36 -0.007 507 766 4
Table 6. Analysis of spectral calibration precision in MCT channel
View tableView in ArticleTable 6. Analysis of spectral calibration precision in MCT channel
序号 波数/cm-1 序号 波数/cm-1 理论 定标后 绝对偏差 理论 定标后 绝对偏差 1 947.74 947.745 27 0.005 27 11 1 481.24 1 481.245 52 0.005 516 2 952.88 952.882 518 0.002 518 12 1 531.64 1 531.646 09 0.006 086 3 957.80 957.801 582 0.001 582 13 1 548.12 1 548.128 9 0.008 92 4 1 233.455 1 233.447 67 0.007 327 14 1 572.928 1 572.922 59 0.005 414 5 1 386.481 1 386.474 2 0.006 803 15 1 672.475 1 672.474 12 0.000 875 6 1 395.803 1 395.796 62 0.006 384 16 1 751.423 1 751.417 17 0.005 834 7 1 404.98 1 404.980 19 0.000 191 17 1 758.581 1 758.577 58 0.003 423 8 1 429.945 1 429.952 37 0.007 374 18 1 779.112 1 779.106 7 0.005 26 9 1 446.478 1 446.474 88 0.003 125 19 1 799.616 1 799.616 06 5.8E-05 10 1 455.30 1 455.301 42 0.001 421 20 1 805.146 1 805.15 0.004 005 平均绝对偏差 0.004 37 cm-1
Table 7. Analysis of spectral calibration precision in InSb channel
View tableView in ArticleTable 7. Analysis of spectral calibration precision in InSb channel
序号 波数/cm-1 序号 波数/cm-1 理论 定标后 绝对偏差 理论 定标后 绝对偏差 1 1 866.38 1 866.38 0.000 449 18 3 142.78 3 142.778 0.001 649 2 1 884.56 1 884.569 0.009 085 19 3 185.26 3 185.265 0.004 782 3 1 895.20 1 895.201 0.000 61 20 3 209.74 3 209.741 0.001 092 4 1 927.80 1 927.809 0.009 243 21 3 254.148 3 254.152 0.003 511 5 1 945.34 1 945.343 0.003 325 22 3 288.48 3 288.486 0.005 784 6 1 967.44 1 967.439 0.000 557 23 3 313.26 3 313.26 0.000 382 7 1 998.92 1 998.917 0.002 515 24 3 397.22 3 397.221 0.000 898 8 2 135.54 2 135.541 0.000 517 25 3 442.5 3 442.504 0.004 054 9 2 139.42 2 139.428 0.008 164 26 3 774.053 3 774.045 0.008 007 10 2 493.88 2 493.878 0.001 547 27 3 777.94 3 777.933 0.007 36 11 2 494.76 2 494.751 0.008 81 28 3 929.36 3 929.353 0.007 466 12 2 847.72 2 847.714 0.006 142 29 3 973.92 3 288.486 0.005 784 13 2 849.34 2 849.34 0.000 323 30 3 995.00 3 973.922 0.001 633 14 2 901.88 2 901.883 0.003 066 31 4 008.58 3 995.006 0.006 169 15 2 904.52 2 904.521 0.001 112 32 4 043.78 4 008.573 0.006 736 16 3 064.404 3 064.411 0.006 523 33 4 075.30 4 043.78 0.000 274 17 3 101.16 3 101.165 0.004 658 平均绝对偏差 0.003 89 cm-1
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Li-Li DU, Li LIU, Shu-Le GE, Zhi-Wei LI, Chuang-Jie ZHOU, Guo-Shen DING. High precision on-orbit spectral calibration of atmospheric infrared ultra-spectral sounder[J]. Journal of Infrared and Millimeter Waves, 2021, 40(2): 214
Paper Information
Category: Research Articles
Received: May. 5, 2020
Accepted: --
Published Online: Aug. 31, 2021
The Author Email: Guo-Shen DING (guoshenahu@163.com)
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