Hyper-spectral computer tomographic detection of OH radicals in the upper and middle atmosphere

Hailiang Shi; Xiong Wei; Haiyan Luo; Zhiwei Li

doi:10.1117/12.2542533

18 December 2019 Hyper-spectral computer tomographic detection of OH radicals in the upper and middle atmosphere

Hailiang Shi, Xiong Wei, Haiyan Luo, Zhiwei Li

Proceedings Volume 11337, AOPC 2019: Optical Spectroscopy and Imaging; 113370G (2019) https://doi.org/10.1117/12.2542533
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

OH radicals in the upper and middle atmosphere are important oxidants and play an important role in atmospheric photochemistry. Current space-based payload can only obtain profile information. In view of the inhomogeneity of atmospheric two-dimensional distribution field, a hyper-spectral OH radical tomography detection scheme based on onedimensional imaging spatial heterodyne spectroscopy is proposed. Horizontal and vertical multi-dimensional atmosphere are detected by combining two orthogonal field-of-view one-dimensional imaging spatial heterodyne spectrometers, and the multi-line-of-sight crossed required for atmospheric tomography detection is achieved by platform movement. Based on this technical scheme, the optical and structural design of the prototype is carried out, and the data form of the interferogram acquired on-orbit is simulated. OH radicals can’t be measured on the ground, so the OH radicals can be obtained by photochemical reaction chamber in the laboratory. The OH measurement results obtained by the prototype agree with the HITRAN simulation results.

Citation Download Citation

Hailiang Shi, Xiong Wei, Haiyan Luo, and Zhiwei Li "Hyper-spectral computer tomographic detection of OH radicals in the upper and middle atmosphere", Proc. SPIE 11337, AOPC 2019: Optical Spectroscopy and Imaging, 113370G (18 December 2019); https://doi.org/10.1117/12.2542533

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KEYWORDS

Tomography

Atmospheric sensing

Prototyping

Heterodyning

Signal detection

Imaging spectroscopy

Photochemistry

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