Results 1 to 10 of about 142,933 (180)

Measurement of the Structure Constant of Refractivity at Optical Wavelengths Using a Scintillometer [PDF]

open access: yesRadioengineering, 2012
The structure constant of the atmospheric refractive index is used for characterizing the turbulence strength and for predicting the scintillation of electromagnetic waves in atmosphere.
M. Grabner, V. Kvicera
doaj   +2 more sources

Forecasting commodity returns by exploiting climate model forecasts of the El Niño Southern Oscillation

open access: yesEnvironmental Data Science, 2022
The physical and socioeconomic environments in which we live are intrinsically linked over a wide range of time and space scales. On monthly intervals, the price of many commodities produced predominantly in tropical regions covary with the dominant mode
Vassili Kitsios   +2 more
doaj   +1 more source

A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects

open access: yesAtmosphere, 2021
The Earth’s atmosphere is the living environment in which we live and cannot escape. Atmospheric turbulence is a typical random inhomogeneous medium, which causes random fluctuations of both the amplitude and phase of optical wave propagating through it.
Fazhi Wang   +4 more
doaj   +1 more source

Some features of a radio signal interaction with a turbulent atmosphere

open access: yesФизика волновых процессов и радиотехнические системы, 2022
On the basis of the solution of Maxwells equations system for electromagnetic radiation in a turbulent atmosphere the differential effective section of scattering of this radiation on turbulence is found.
Dmitriy S. Klyuev   +5 more
doaj   +1 more source

Occurrence of fluctuations in the amplitude and phase of the radio signal in a turbulent atmosphere

open access: yesФизика волновых процессов и радиотехнические системы, 2023
Interaction of an electromagnetic wave, as the determined wave process spreading in an atmosphere and atmospheric turbulence, as stationary stochastic wave process is considered.
Dmitriy S. Klyuev   +5 more
doaj   +1 more source

Single-Layer Phase Screen With Pointing Errors for Free Space Optical Communication

open access: yesIEEE Access, 2021
Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, and it is generally used in free space optical communication (FSOC).
Xin Liu   +4 more
doaj   +1 more source

CSIRO CAFE-60 submissions to the World Meteorological Organization operational decadal forecasts and the international multi-model data exchange [PDF]

open access: yesJournal of Southern Hemisphere Earth Systems Science, 2022
The Climate Analysis Forecast Ensemble (CAFE) system was developed by the Decadal Climate and Forecasting Project (DCFP) within the CSIRO Climate Science Centre (CSC) with the express purposes of providing operational ensemble forecasts of the near-term ...
Paul A. Sandery   +3 more
doaj  

Free Space Measurement Device Independent Quantum Key Distribution with Modulating Retro-Reflectors under Correlated Turbulent Channel

open access: yesEntropy, 2021
Modulating retro-reflector (MRR), originally introduced to support laser communication, relieves most of the weight, power, and pointing requirements to the ground station.
Xingyu Wang   +6 more
doaj   +1 more source

Design and Performance Analysis of NadamSPGD Algorithm for Sensor-Less Adaptive Optics in Coherent FSOC Systems

open access: yesPhotonics, 2022
Sensor-less adaptive optics (SLAO) based on stochastic parallel gradient descent (SPGD) is effective for the compensation of atmospheric turbulence in coherent free-space optical communication (CFSOC) systems.
Li Xu   +3 more
doaj   +1 more source

An Efficient Recognition Method for Orbital Angular Momentum via Adaptive Deep ELM

open access: yesSensors, 2023
For orbital angular momentum (OAM) recognition in atmosphere turbulence, how to design a self-adapted model is a challenging problem. To address this issue, an efficient deep learning framework that uses a derived extreme learning machine (ELM) has been ...
Haiyang Yu   +3 more
doaj   +1 more source

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