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27 March 2022 Influence of wind speed distribution on optical turbulence parameters over the Tibetan Plateau
Liming Zhu, Gang Sun, Hanjiu Zhang, Duolong Chen, Yuan Fang, Haojia Zhang, Pengfei Wu, Xuebin Li
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169AE (2022) https://doi.org/10.1117/12.2625870
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
The distribution of wind speed with height will affect the optical turbulence parameters. Based on the reanalysis data of the National Centers for environmental prediction (NCEP), this paper analyzes the monthly and seasonal variations of wind speed in the Tibetan Plateau region during the past 15 years from 2005 to 2020 at Delingha observatory, It is found that the seasonal variation trend of the seeing and 200 hpa wind speed is consistent, and the Fried parameter is negatively correlated with 200 hpa wind speed, which verifies the possibility that the upper air speed can approximately represent the turbulence intensity of the whole layer. The experimental results show that: in autumn and winter, the high altitude wind speed is strong, the seeing is poor, and the astronomical observation imaging effect is poor; In summer, the high altitude wind speed is low and the seeing is good, which is the best time for astronomical observation.
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Liming Zhu, Gang Sun, Hanjiu Zhang, Duolong Chen, Yuan Fang, Haojia Zhang, Pengfei Wu, and Xuebin Li "Influence of wind speed distribution on optical turbulence parameters over the Tibetan Plateau", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169AE (27 March 2022); https://doi.org/10.1117/12.2625870
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KEYWORDS
Optical turbulence
Atmospheric optics
Turbulence
Observatories
Adaptive optics
Astronomy
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