Design and analysis of optic system for satellite-borne miniature high-resolution greenhouse gas monitoring instrument

Lingjun Gu; Qiao Pan; Xinhua Chen; Weimin Shen

doi:10.1117/12.2666883

4 April 2023 Design and analysis of optic system for satellite-borne miniature high-resolution greenhouse gas monitoring instrument

Lingjun Gu, Qiao Pan, Xinhua Chen, Weimin Shen

Author Affiliations +

Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 126177S (2023) https://doi.org/10.1117/12.2666883
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

Climate change caused by global warming has serious implications for the sustainable development of human society. Increasing concentration of atmospheric greenhouse gas, mainly CO₂ and CH₄, is an important cause of global warming. The satellite-based greenhouse gas monitor can efficiently monitor the concentration and distribution of global greenhouse gases, which is of great significance to the study of global warming. One of the important development trends of satellite-borne greenhouse gas monitors is light weight and high performance. A satellite payload is designed in this paper which is applied to monitoring greenhouse gas emissions in certain area. After analyzing the relationship between spectral resolution, Signal-to-Noise Ratio (SNR) and detection accuracy, the requirements of spectral resolution and SNR to detect 1ppm change of CO₂ column concentration are determined. Then, a fixed-cavity Fabry-Perot (F-P) etalon is selected to be the spectroscopic element and its parameters are determined. Other optical system parameters are obtained based on satellite remote sensing requirement. Finally, the optical system of compact Fabry-Perot imaging spectrometer is designed according to the parameters above. This imaging spectrometer consists of three parts: telescope system, a spectroscopic system based on F-P and imaging system. The whole size of optical system of spectrometer is 160mm*160mm*480mm, it is a miniature and simplify instrument with high performance.

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Lingjun Gu, Qiao Pan, Xinhua Chen, and Weimin Shen "Design and analysis of optic system for satellite-borne miniature high-resolution greenhouse gas monitoring instrument", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 126177S (4 April 2023); https://doi.org/10.1117/12.2666883

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KEYWORDS

Signal to noise ratio

Satellites

Spectral resolution

Fabry–Perot interferometers

Carbon monoxide

Spectroscopy

Design and modelling

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