Abstract
The paper focuses on the investigations of the optical turbulence structure. The distributions of the repeatability of the structure characteristic of the air refractive index are obtained. A scenario of decreasing the intensity of the optical turbulence in the summer is discussed. Numerical estimates of this scenario are given. Using classical methods of wavefront analysis, the results of the first studies of the vertical structure of atmospheric turbulence at the Baykal astrophysical observatory site are presented.
Highlights
The degradation of image quality due to the atmospheric turbulence has been a long-known problem
The research results show that atmospheric turbulence in the surface layer at the Baykal astrophysical observatory site is most developed in the winter
Increased repeatability of moderate and even weak turbulence is noted in the spring
Summary
The degradation of image quality due to the atmospheric turbulence has been a long-known problem Turbulent fluctuations of both air temperature and wind speed induce variations in the air refractive index. To estimate the strength of the optical turbulence in the atmospheric boundary layer at the Baykal astrophysical observatory site, we performed the measurements of the air temperature and wind speed using meteorological weather station “AMK-03” (sonic anemometer) mounted on a mast (Figure 1) [8]. To analyze the temporal variability of the optical turbulence, we estimated the distributions of the repeatability of the structure characteristic of the air refractive index fluctuations in different seasons. A warm water surface provides high vertical air temperature gradients inducing the development of convective instability
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