A new phase-screen method for electromagnetic wave propagation in turbulent flows using large-eddy simulation

Dipankar, Anurag; Sagaut, Pierre

doi:10.1016/j.jcp.2009.07.011

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…Using the Gaussian distribution for the Fourier transform of X as in the previous case, we haveĝ(k) = µ 1 (k) + iµ 2 (k) and by (5) and similar to 7,…”

Section: Fourier Filtering Methodsmentioning

confidence: 99%

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Generation of a sequence of correlated phase screens

Fatheddin

Gustafsson

2017

Optics Communications

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“…Using the Gaussian distribution for the Fourier transform of X as in the previous case, we haveĝ(k) = µ 1 (k) + iµ 2 (k) and by (5) and similar to 7,…”

Section: Fourier Filtering Methodsmentioning

confidence: 99%

“…It is assumed that in the space between phase screens, the phase does not change. For examples of results based on uncorrelated phase screens see for example [5,17,18].…”

mentioning

confidence: 99%

Generation of a sequence of correlated phase screens

Fatheddin

Gustafsson

2017

Optics Communications

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“…The LES generates instantaneous 3D fields of these state variables required to precisely retrieve turbulence parameters. In this letter, a well-documented case of tropical MABL for which a convective cloud layer is located between 500 and 1500 m in altitude is studied [16,17]. This atmospheric simulation is performed using the open-source code MicroHH [18].…”

Section: Inhomogeneous Turbulence From Atmospheric Simulationsmentioning

confidence: 99%

Electromagnetic Wave Propagation Through Realistic Inhomogeneous Turbulence

2024

RSL

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The marine atmospheric boundary layer (MABL) is an intricate environment where diverse atmospheric phenomena can affect electromagnetic (EM) systems. The stochastic multiple phase screen method (sMPS) is conventionally used to model the impact of tropospheric turbulence on EM wave propagation. It often relies on the use of homogeneous Kolmogorov spectra. This study presents two original methods for generating inhomogeneous turbulence with sMPS. The LES-Kolmogorov approach uses accurate turbulent structure constant profiles directly extracted from atmospheric simulations, while the Bump-Kolmogorov method (BK model) approximately replicates it with a parametric model. Log-amplitude profile computations highlight the specific impact of turbulence inhomogeneity. The proposed methods show good agreement, suggesting the feasibility of an accurate parametric replication of turbulence in the MABL.

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“…When the vortex waves u 0 (r, θ, z) are transmitted in the atmospheric turbulence modeled by the phase screen method, the transmission process is divided into two parts [29]. In the first part, the vortex waves are directly affected by the atmospheric turbulence to produce an additional phase, which can be expressed in the cylindrical coordinate system as follows:…”

Section: Phase-screen Simulating Turbulencementioning

confidence: 99%

A Preliminary Study on the Inversion Method for the Refraction Structure Parameter from Vortex Electromagnetic Waves

et al. 2023

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When vortex electromagnetic waves propagate through a turbulent atmosphere, the amplitude and phase of the electromagnetic waves are disturbed, creating the scintillation effect. According to the scintillation index of vortex waves, a new method of retrieving the turbulent refraction structure parameter was proposed using a genetic algorithm, and the feasibility of this method was verified by simulated experiments. The numerical results showed that the inversed value obtained by the genetic algorithm was close to the real parameter when the turbulent inner scale and outer scale were fixed. However, there was a gap between the inversed value and the real parameter when only the turbulent outer scale was fixed. These results suggest that vortex wave data can be used for turbulent refraction structure parameter inversion, and they provide new research directions for atmospheric remote sensing.

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A new phase-screen method for electromagnetic wave propagation in turbulent flows using large-eddy simulation

Cited by 6 publications

References 29 publications

Generation of a sequence of correlated phase screens

Generation of a sequence of correlated phase screens

Electromagnetic Wave Propagation Through Realistic Inhomogeneous Turbulence

A Preliminary Study on the Inversion Method for the Refraction Structure Parameter from Vortex Electromagnetic Waves

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