Aperture averaging effects on the probability density of irradiance fluctuations in moderate-to-strong turbulence
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Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/10208
Tipus de documentArticle
Data publicació2007-04-30
EditorOptical Society of America
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 2.5 Genèrica
Abstract
The lognormal (LN) and gamma–gamma (GG) distributions are compared to simulated and experimental
data of the irradiance fluctuations of a Gaussian beam wave propagating through the atmosphere along
a horizontal path, near the ground, in the moderate-to-strong turbulence regime. Irradiance data were
collected simultaneously at three receiving apertures of different sizes. Atmospheric parameters were
inferred from the measurements and scintillation theory and were used to develop the parameters for
the theoretical probability density functions. Numerical simulations were produced with the same Cn 2
value as the experimental data. Aperture-averaging effects were investigated by comparing the irradiance
distributions for the three apertures at two different values of the structure parameter Cn 2 , and,
hence, different values of the coherence radius 0. For the moderate-to-strong fluctuation regime, the GG
distribution provides a good fit to the irradiance fluctuations collected by finite-sized apertures that are
significantly smaller than 0. For apertures larger than or equal to 0, the irradiance fluctuations appear
to be LN distributed.
CitacióVetelino, F. S.; Young, C.; Andrews, L.; Recolons, J. (2007). Aperture averaging effects on the probability density of irradiance fluctuations in moderate-to-strong turbulence. APPLIED OPTICS , 46 (11): 2099-2108. ISSN:0003-6935
ISSN0003-6935
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