Pre-Launch Spectral Calibration of FY-3F/HIRAS-Ⅱ

Chunyuan Shao; Mingjian Gu; Chengli Qi; Lu Li; Tianhang Yang; Xing Chen

doi:10.3788/AOS231522

Acta Optica Sinica, Volume. 44, Issue 12, 1230001(2024)

Pre-Launch Spectral Calibration of FY-3F/HIRAS-Ⅱ

Chunyuan Shao^1、*, Mingjian Gu^1、**, Chengli Qi², Lu Li², Tianhang Yang¹, and Xing Chen¹

¹Key Laboratory of Infrared System Detection and Imaging Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

²National Satellite Meteorological Center, China Meteorogical Administration, Beijing 100081, China

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Figures & Tables(14)

Fig. 1. Schematic of HIRAS-Ⅱ optical system

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Fig. 2. Off-axis effect diagram

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Fig. 3. Instrument line shape function of center pixel

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Fig. 4. Instrument line shape function of off-axis pixel

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Fig. 5. HIRAS-Ⅱ pixel configuration

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Fig. 6. Uncorrected NH₃ observation simulation and theoretical simulation spectra

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Fig. 7. Relationship between off-axis angle $θ_{r c}$ and spectral calibration accuracy ( $θ_{R} = 60'$ )

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Fig. 8. Relationship between pixel field of view angle $θ_{R}$ and spectral calibration accuracy ( $θ_{r c} = 0'$ )

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Fig. 9. Schematic of slit scanning

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Fig. 10. Process of spectral correction

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Table 1. HIRAS-Ⅱ spectral performance requirement

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Table 1. HIRAS-Ⅱ spectral performance requirement

Band

Spectral range /cm^-1

Spectral resolution /cm^-1

Spectral accuracy /10^-6

Long wave

650-1168.125

（15.38-8.56 μm）

0.625

Middle wave I

1168.75-1920

（8.55-5.20 μm）

1.25

Middle

wave Ⅱ

1920.625-2600

（5.20-3.48 μm）

2.5

Table 2. Spectral calibration accuracy of long wave

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Table 2. Spectral calibration accuracy of long wave

FOV	FOV1	FOV2	FOV3	FOV4	FOV5	FOV6	FOV7	FOV8	FOV9
Spectral accuracy before correction /10^-6	-388.11	-255.89	-526.32	-149.68	-23.16	-304.32	-350.84	-219.05	-490.63
Spectral accuracy after correction /10^-6	0.32	0.21	0.42	-1.05	0.32	0.11	0.95	-0.42	0.42

Table 3. Spectral calibration accuracy of middle wave I

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Table 3. Spectral calibration accuracy of middle wave I

FOV	FOV1	FOV2	FOV3	FOV4	FOV5	FOV6	FOV7	FOV8	FOV9
Spectral accuracy before correction /10^-6	-395.46	-256.62	-539.62	-162.38	-24.69	-310.92	-367.62	-229.31	-513.38
Spectral accuracy after correction /10^-6	1.46	0.62	-1.69	-0.15	0.54	0.77	2.23	1.08	-0.15

Table 4. Spectral calibration accuracy of middle wave Ⅱ

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Table 4. Spectral calibration accuracy of middle wave Ⅱ

FOV	FOV1	FOV2	FOV3	FOV4	FOV5	FOV6	FOV7	FOV8	FOV9
Spectral accuracy before correction /10^-6	-368.63	-231.42	-494.93	-153.93	-17.08	-279.13	-360.68	-219.09	-477.85
Spectral accuracy after correction /10^-6	1.10	-0.14	1.83	0.46	1.92	-0.87	1.19	-0.09	-0.05

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Chunyuan Shao, Mingjian Gu, Chengli Qi, Lu Li, Tianhang Yang, Xing Chen. Pre-Launch Spectral Calibration of FY-3F/HIRAS-Ⅱ[J]. Acta Optica Sinica, 2024, 44(12): 1230001

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Paper Information

Category: Spectroscopy

Received: Sep. 5, 2023

Accepted: Nov. 3, 2023

Published Online: Apr. 18, 2024

The Author Email: Shao Chunyuan (scyshuier@163.com), Gu Mingjian (MingjianGu@sina.com)

DOI:10.3788/AOS231522

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology