Vertical Profiles of Optical Turbulence and Estimates of Turbulence Outer Scale above the Baykal Astrophysical Observatory

IF 0.9 Q4 OPTICS
A. Yu. Shikhovtsev, P. G. Kovadlo
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引用次数: 0

Abstract

The study of spatiotemporal structure of optical turbulence and the development of techniques for determining its characteristics at different altitudes in the atmosphere are of great importance for astronomical adaptive optics. Design of an adaptive optics system and technical characteristics of its components largely depend on optical turbulence along the line of sight of a telescope. In this paper, the technique for estimating the vertical profiles of air refractive index structure characteristic is modified. Based on ERA5 reanalysis data, this method was used to derive statistically representative vertical profiles of air refractive index structure characteristic and turbulence outer scale at the Large Solar Vacuum Telescope (LSVT) site. The problem of estimating the turbulence outer scale is discussed taking into account surface mast micrometeorological measurements and optical measurements at the LSVT. The results are the basis for constructing a multi-mirror adaptive optics system for the LSVT. In particular, the above profiles are important for further refinement of the optical conjugation heights. The suggested technique can also be used to describe optical turbulence over other ground-based solar telescopes.

Abstract Image

研究光学湍流的时空结构和开发确定其在大气层不同高度的特征的技术对天文自适应光学非常重要。自适应光学系统的设计及其组件的技术特性在很大程度上取决于望远镜视线沿线的光学湍流。本文修改了估算空气折射率结构特征垂直剖面的技术。在ERA5再分析数据的基础上,利用该方法得出了大型太阳真空望远镜(LSVT)观测点具有统计代表性的空气折射率结构特征垂直剖面图和湍流外尺度。考虑到 LSVT 的表面桅杆微气象测量和光学测量,讨论了估算湍流外部尺度的问题。这些结果是为 LSVT 建造多镜自适应光学系统的基础。特别是,上述剖面对于进一步完善光学共轭高度非常重要。建议的技术也可用于描述其他地面太阳望远镜的光学湍流。
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来源期刊
CiteScore
2.40
自引率
42.90%
发文量
84
期刊介绍: Atmospheric and Oceanic Optics  is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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