Chinese Journal of Lasers, Volume. 48, Issue 12, 1210002(2021)
Research on Wide-Range and High-Resolution Thermal Infrared Remote Sensing Imaging Technology
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Fig. 1. Layout of TIRI. (a) Overall structure of TIRI; (b) internal structure of TIRI; (c) external structure of TIRI
Fig. 7. Diagram of forward whisk-broom imaging. (a) Diagram of forward whisk-broom imaging process; (b) angular velocity curve of swinging mirror during forward whisk-brooming
Fig. 8. Diagram of forward and backward whisk-broom imaging. (a) Diagram of forward and backward whisk-broom imaging process; (b) angular velocity curve of swinging mirror during forward and backward whisk-brooming
Table 1. Parameters comparison of main thermal infrared payloads at home and abroad
View tableTable 1. Parameters comparison of main thermal infrared payloads at home and abroad
Index Landsat 8 TIRS VRSS-2 IRC GF-5 VIRMI ASTER TIR HJ-1B IRS CASEarth TIRI Orbit /km 705 645 705 702 650 505 Width /km 185 30 60 60 720 300 Resolution /m 100 60 40 90 300 30 Width/Resolution 1850 500 1500 666 2400 10000 Spectrum /μm 10.6-11.19 11.5-12.51 10.3-11.3 11.5-12.5 10.3-11.3 11.4-12.5 8.125-8.475 8.475-8.825 8.925-9.275 10.25-10.95 10.95-11.65 10.5-12.5 10.3-11.3 11.5-12.5 8.0-10.5 Noise-equivalent temperature difference /K 0.4 (at 300 K) / / 0.3 (at 300 K) / 0.2 (at 300 K) Calibration accuracy /K 1.67 (at 300 K) (B11: thermal infrared band of Landsat 8 TIRS) 1.5 (at 280 K) 1 (at 300 K) 1 (at 300 K) 1 (at 300 K) 1 (at 300 K) Detector /pixel 1860 512 1500 700 400 2000
Table 2. Technical specifications of TIRI
View tableTable 2. Technical specifications of TIRI
Item Design index Orbit /km 505 Imaging width /km 300 Resolution /m 30 Bands /μm 8-10.5 10.3-11.3 11.5-12.5 Pixel size /μm 30 Dynamic range /K 220-340 Scanning accuracy /(″) ≤ 6 (object space, 3σ) Sensitivity /K < 0.1 (at 300 K) Field of view (FOV) /(°) 7.0 Scanning FOV /(°) ≥ 33.1 Dynamic modulation transfer function ≥ 0.1 F# 1.94 Focal length /mm 505×(1±5%)
Table 3. Temperature field design of TIRI
View tableTable 3. Temperature field design of TIRI
Item CASEarth TIRI Optic lens 195 K Scan mirror 270 K
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Fansheng Chen, Zhuoyue Hu, Xiaoyan Li, Lin Yang, Xingjian Hu, Yong Zhang. Research on Wide-Range and High-Resolution Thermal Infrared Remote Sensing Imaging Technology[J]. Chinese Journal of Lasers, 2021, 48(12): 1210002
Paper Information
Category: remote sensing and sensor
Received: Mar. 1, 2021
Accepted: Apr. 19, 2021
Published Online: Jun. 7, 2021
The Author Email: Chen Fansheng (cfs@mail.sitp.ac.cn)
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