Imaging atmospheric turbulence, using entropy to quantify turbulence strength

Vertical profile of turbulence strength ( Cn2 ) is one of the most important attributes for evaluating a site's astronomical performances. Although seeing is commonly used for describing turbulence strength, it can only represent the integral of all layers of the turbulence above the observer....

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Bibliographic Details
Published in:Research in astronomy and astrophysics 2020-11, Vol.20 (11), p.180
Main Authors: Feng, Lu, Shen, Zhi-Xia, Hu, Jing-Yao
Format: Article
Language:English
Subjects:
Atmospheric turbulence
Complex systems
Entropy
Evaluation
site testing
Strength
techniques: telescope
Online Access:Get full text
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Summary:Vertical profile of turbulence strength ( Cn2 ) is one of the most important attributes for evaluating a site's astronomical performances. Although seeing is commonly used for describing turbulence strength, it can only represent the integral of all layers of the turbulence above the observer. Other techniques which can be applied to produce Cn2 , such as DIMM-MASS, SCIDAR, etc., all rely on rather complex systems to do the measurements. In this paper, we present an idea to evaluate the relative strength of turbulence with entropies of short exposure images taken at different conjugated heights of the turbulence. Initial experimental results are also presented in the paper.
ISSN:1674-4527
DOI:10.1088/1674-4527/20/11/180