Scintillation Index of a Plane Wave Propagating Through Kolmogorov and Non-Kolmogorov Turbulence along Laser-Satellite Communication Downlink at Large Zenith Angles

Now it is indisputable fact that the Earth’s aerosphere contains Kolmogorov and non-Kolmogorov turbulence, which has been confirmed by increasing experimental evidences and theoretical investigations. Based on this, the scientific community conducts investigations on the combined influence of Kolmog...

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Bibliographic Details
Published in:Journal of Russian laser research 2020-11, Vol.41 (6), p.616-627
Main Authors: Du, Wenhe, Cheng, Xiujuan, Wang, Yanchun, Jin, Zhan, Liu, Daosen, Feng, Shuang, Yang, Zhanyu
Format: Article
Language:English
Subjects:
Aerodynamics
Altitude
Communications systems
Downlinking
Lasers
Microwaves
Non-Kolmogorov turbulence
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Plane waves
RF and Optical Engineering
Satellite communications
Scintillation
Wave propagation
Zenith
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Summary:Now it is indisputable fact that the Earth’s aerosphere contains Kolmogorov and non-Kolmogorov turbulence, which has been confirmed by increasing experimental evidences and theoretical investigations. Based on this, the scientific community conducts investigations on the combined influence of Kolmogorov turbulence and non-Kolmogorov one on optical wave propagating in the aerosphere. In this paper, based on the further additional measurements, a three-layer altitude-dependent turbulent spectrum model of refractive-index fluctuations for vertical/slant path is proposed to describe the variations of turbulent statistical characteristics with altitude in the aerosphere. This model that is more accurate than the two-layer model is used to estimate the performance of laser-satellite communication system for satellite-to-ground link. Using the extended Rytov theory, the scintillation index of a plant wave propagating through Kolmogorov and non-Kolmogorov turbulence along laser-satellite communication downlink at large zenith angles is presented. It is noteworthy that this expression is also valid in all regimes of turbulent fluctuations.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-020-09916-3