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7 March 2019 Decoupling atmosphere Rayleigh-Brillouin scattering spectrum in kinetic regime
Jingjing Liu, Jiale Kang, Dengxin Hua, Tingyao He, Qing Yan, Jun Wang
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Proceedings Volume 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation; 110533F (2019) https://doi.org/10.1117/12.2512152
Event: 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), 2018, Kunming, China
Abstract
In the detection of atmospheric temperature profile by Rayleigh scattering, the influence of Brillouin scattering is usually ignored and the accuracy of temperature detection is reduced. Current researches on Brillouin scattering are mainly focusing on hydrodynamic and Knudsen regime, few researches has been done on the kinetic regime. In order to improve the precision of atmospheric temperature measurement, a mathematical model based on three Gussian distributions was adopted to study the Rayleigh-Brillouin scattering spectrum (RBS) in kinetic regime, the mixed Rayleigh and Brillouin signal in atmospheric echo signal is separated to obtain independent Rayleigh and Brillouin spectrum. Finally, the experimental platform was set up to control simulation of atmospheric environment system and establishes a hyperspectral splitting optical system based on Fabry-Perot interferometer. The spectrum obtained by the experiment was used to optimize the mathematical model and improve the detection accuracy of atmospheric temperature profiles.
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Jingjing Liu, Jiale Kang, Dengxin Hua, Tingyao He, Qing Yan, and Jun Wang "Decoupling atmosphere Rayleigh-Brillouin scattering spectrum in kinetic regime", Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 110533F (7 March 2019); https://doi.org/10.1117/12.2512152
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KEYWORDS
Rayleigh scattering
Laser scattering
Atmospheric modeling
Mathematical modeling
Atmospheric sciences
Temperature metrology
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