China's First Infrared Occultation Spectrometer (GaoFen-5/AIUS) Monitoring Atmosphere Above Antarctic: Evaluation of Methane Profiles
The atmospheric infrared ultraspectral sounder (AIUS) is China's first infrared occultation spectrometer onboard the GaoFen-5 satellite. This instrument provides measurements in the near-infrared and mid-infrared spectral regions with a spectral resolution of 0.02 cm<inline-formula><te...
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| Published in | IEEE journal of selected topics in applied earth observations and remote sensing Vol. 17; pp. 7946 - 7956 |
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| Main Authors | , , , , , , , , , , , |
| Format | Journal Article |
| Language | English |
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2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| ISSN | 1939-1404 2151-1535 2151-1535 |
| DOI | 10.1109/JSTARS.2024.3381651 |
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| Abstract | The atmospheric infrared ultraspectral sounder (AIUS) is China's first infrared occultation spectrometer onboard the GaoFen-5 satellite. This instrument provides measurements in the near-infrared and mid-infrared spectral regions with a spectral resolution of 0.02 cm<inline-formula><tex-math notation="LaTeX">^{-1}</tex-math></inline-formula>, monitoring key greenhouse gases like methane (CH<inline-formula><tex-math notation="LaTeX">_{4}</tex-math></inline-formula>). In this study, we have developed a physics-based retrieval algorithm for accurately deriving CH<inline-formula><tex-math notation="LaTeX">_{4}</tex-math></inline-formula> mole fraction profiles from infrared absorption spectra. The retrieval algorithm is applied to the AIUS and successfully obtains CH<inline-formula><tex-math notation="LaTeX">_{4}</tex-math></inline-formula> mole fraction profiles from January to December 2019 over Antarctic. The validation results show that the retrieval algorithm has a satisfactory performance using AIUS measurements, with average relative standard deviation of the differences less than 7.2% throughout the altitude range of 10-70 km. |
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| AbstractList | The atmospheric infrared ultraspectral sounder (AIUS) is China's first infrared occultation spectrometer onboard the GaoFen-5 satellite. This instrument provides measurements in the near-infrared and mid-infrared spectral regions with a spectral resolution of 0.02 cm<tex-math notation="LaTeX">$^{-1}$</tex-math>, monitoring key greenhouse gases like methane (CH<tex-math notation="LaTeX">$_{4}$</tex-math>). In this study, we have developed a physics-based retrieval algorithm for accurately deriving CH<tex-math notation="LaTeX">$_{4}$</tex-math> mole fraction profiles from infrared absorption spectra. The retrieval algorithm is applied to the AIUS and successfully obtains CH<tex-math notation="LaTeX">$_{4}$</tex-math> mole fraction profiles from January to December 2019 over Antarctic. The validation results show that the retrieval algorithm has a satisfactory performance using AIUS measurements, with average relative standard deviation of the differences less than 7.2% throughout the altitude range of 10-70 km. The atmospheric infrared ultraspectral sounder (AIUS) is China's first infrared occultation spectrometer onboard the GaoFen-5 satellite. This instrument provides measurements in the near-infrared and mid-infrared spectral regions with a spectral resolution of 0.02 cm<inline-formula><tex-math notation="LaTeX">^{-1}</tex-math></inline-formula>, monitoring key greenhouse gases like methane (CH<inline-formula><tex-math notation="LaTeX">_{4}</tex-math></inline-formula>). In this study, we have developed a physics-based retrieval algorithm for accurately deriving CH<inline-formula><tex-math notation="LaTeX">_{4}</tex-math></inline-formula> mole fraction profiles from infrared absorption spectra. The retrieval algorithm is applied to the AIUS and successfully obtains CH<inline-formula><tex-math notation="LaTeX">_{4}</tex-math></inline-formula> mole fraction profiles from January to December 2019 over Antarctic. The validation results show that the retrieval algorithm has a satisfactory performance using AIUS measurements, with average relative standard deviation of the differences less than 7.2% throughout the altitude range of 10-70 km. The atmospheric infrared ultraspectral sounder (AIUS) is China's first infrared occultation spectrometer onboard the GaoFen-5 satellite. This instrument provides measurements in the near-infrared and mid-infrared spectral regions with a spectral resolution of 0.02 cm[Formula Omitted], monitoring key greenhouse gases like methane (CH[Formula Omitted]). In this study, we have developed a physics-based retrieval algorithm for accurately deriving CH[Formula Omitted] mole fraction profiles from infrared absorption spectra. The retrieval algorithm is applied to the AIUS and successfully obtains CH[Formula Omitted] mole fraction profiles from January to December 2019 over Antarctic. The validation results show that the retrieval algorithm has a satisfactory performance using AIUS measurements, with average relative standard deviation of the differences less than 7.2% throughout the altitude range of 10–70 km. |
| Author | Wang, Hongmei Shi, Jiancheng Li, Xiaoying Rao, Lanlan Shi, Hailiang Zhang, Xingying Guo, Yuhang Xu, Jian Ge, Shule Cao, Xifeng Liu, Shuanghui Wang, Yapeng |
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| SubjectTerms | Absorption spectra Algorithms Antarctic Antarctica Atmospheric measurements Atmospheric monitoring Extraterrestrial measurements GaoFen-5 (GF-5)/atmospheric infrared ultraspectral sounder (AIUS) Gases Greenhouse gases Infrared absorption Infrared spectra Infrared spectrometers Instruments Mathematical models Methane methane (CH<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> _{4}</tex-math> </inline-formula> </named-content>) methane (CH<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <tex-math notation="LaTeX">$_{4}$</tex-math> </named-content>) Monitoring Near infrared radiation Occultation Physics Retrieval retrieval algorithm Satellites Spectral resolution |
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| Title | China's First Infrared Occultation Spectrometer (GaoFen-5/AIUS) Monitoring Atmosphere Above Antarctic: Evaluation of Methane Profiles |
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