Offshore atmospheric optical turbulence characteristics relevant to astronomy and atmospheric physics

Manman Xu; Shiyong Shao; Qing Liu; Ningquan Weng

doi:10.1117/12.2624572

27 March 2022 Offshore atmospheric optical turbulence characteristics relevant to astronomy and atmospheric physics

Manman Xu, Shiyong Shao, Qing Liu, Ningquan Weng

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121695T (2022) https://doi.org/10.1117/12.2624572
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

Due to the space and time constraints of turbulence measurement equipment and test scene, it is difficult to obtain the refractive index structure constant of the atmosphere over the offshore. In this paper, the statistical characteristics of atmospheric optical turbulence over the offshore are summarized by analyzing the meteorological data. Within the reaching height of the sounding ball, most of the wind shear is within 0.016 s^-1 from the 1km up to 15 km, and exceed 0.016 s^-1 above 15km. Also, the values of temperature gradient are less than 0 km^-1from the ground to 15 km, and more than 0 km¹ above 15km. The turbulent energy dissipation rate, potential refractive index gradient and outer scale peaks correspond to the up troposphere with altitudes around 13 km. Moreover, the mean values of coherence length, seeing, isoplanatic angle and coherence time from radiosonde measurement respectively are 4.15cm, 1.82arcsec, 0.24arcsec and 0.84ms over the offshore. The mean measurement result of seeing is generally greater than the night-time value of other observation sites. It is of great significance to research the turbulent characteristics of ocean atmosphere for optical transmission and astronomical observations.

Citation Download Citation

Manman Xu, Shiyong Shao, Qing Liu, and Ningquan Weng "Offshore atmospheric optical turbulence characteristics relevant to astronomy and atmospheric physics", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121695T (27 March 2022); https://doi.org/10.1117/12.2624572

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