Infrared and Laser Engineering, Volume. 54, Issue 6, 20240574(2025)
Research on the on-orbit calibration method for spaceborne infrared spectral imager using dual blackbodies
Figures & Tables(14)
Fig. 1. The positions of on-board blackbody and low-temperature blackbody on the equipment
Fig. 2. Two-point linear fitting result through "low-temperature blackbody + on-board blackbody"
Fig. 3. The temperature deviation of different radiation targets through "low-temperature blackbody (240 K)+on-board blackbody (290 K)"
Fig. 4. The temperature deviation of different radiation targets through "low-temperature blackbody (250 K)+on-board blackbody (290 K)"
Fig. 5. Two-point linear fitting result through "on-board blackbody (290 K)+ cold space"
Fig. 6. The temperature deviation of different radiation targets through "on-board blackbody (290 K) +cold space"
Fig. 7. Two-point linear fitting result through "low-temperature blackbody (250 K)+ cold space"
Fig. 8. The temperature deviation of different radiation targets through "low-temperature blackbody (250 K) +cold space"
Fig. 9. The signals of cold space，low-temperature blackbody and on-board blackbody
Fig. 10. The temperature difference distribution for the multiple Earth targets between Method 2-Method 1 and Method 3-Method 1
Fig. 11. The temperature difference distribution for the Earth target between Method 2-Method 1 and Method 3-Method 1
Fig. 12. The temperature difference distribution for the multiple Earth targets between Method 2-Method 1 and Method 3-Method 1
Fig. 13. The temperature difference distribution for the Earth target between Method 2-Method 1 and Method 3-Method 1
Table 1. The responsive ratio consistency of the dual blackbody before and after launch
View tableView in ArticleTable 1. The responsive ratio consistency of the dual blackbody before and after launch
Comparison 10.8 μm 12 μm On orbit Vacuum On orbit Vacuum Responsivity of on-board blackbody 19.04 18.81 17.58 17.08 Responsivity of low-temperature blackbody 18.86 18.73 17.46 17.01 Γ 1.0097 1.0045 1.007 1.004 H 1.005 1.003
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Yunmeng LIU, Yang WANG, Lei DING, Huixian DUAN, Jinguang CHAI. Research on the on-orbit calibration method for spaceborne infrared spectral imager using dual blackbodies[J]. Infrared and Laser Engineering, 2025, 54(6): 20240574
Paper Information
Category: Infrared
Received: Jan. 12, 2025
Accepted: --
Published Online: Jul. 1, 2025
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