Atmosphere Propagation and Communication Channel Model for Laser Wavelengths

A Computationally Efficient Numerical Simulation for Generating Atmospheric Optical Scintillations

“…We adopt some of the ideas proposed in (Brookner, 1970) that represent the starting point for our investigation. Thus a locally homogeneous and locally isotropic atmosphere is supposed through which a plane wave is transmitted under a weak fluctuation regime.…”

“…In fact, all these effects let the formation of unstable air masses that, eventually, can be decomposed into turbulent eddies of different sizes, initiating the turbulent process. This atmospheric turbulent process can be physically described by Kolmogorov cascade theory (Andrews & Phillips, 1998;Brookner, 1970;Frisch, 1995;Tatarskii, 1971). Thus, turbulent air motion represents a set of eddies of various scales sizes.…”

Analysis of a Long-Distance System Measuring the Concentration of Atmospheric Gaseous Pollutants

“…The mean molecule density is obtained from (1) and (2) Two such contributions are considered in this paper, fluctuations in the low-pass filtered detector currents caused by detector noise and atmospheric scintillation. It is assumed that other error contributions can be neglected compared to these.…”

“…Reviews of the literature dealing with this scintillation problem are given in (2] and [3]. Experimental results from [4] about CO2 -laser radiation propagation are used in this analysis.…”

“…The temporal power spectrum of the (log-amplitude) normalized intensity fluctuations has been described by different theoretical models, reviewed in [2] and [3]. A simple model based on measurements by Fitzmaurice et al [4] is used here, together with theoretical results concerning the propagation range dependence of the variance and the correlation time of the log-amplitude normalized intensity variation.…”