TY - JOUR
T1 - HIGH FREQUENCY MULTIFRACTALITY in RETURN INTERVALS from FADING INDUCED by TURBULENCE
AU - Olivares, Felipe
AU - Funes, Gustavo
AU - PEREZ, DARIO GABRIEL
N1 - Publisher Copyright:
© 2021 World Scientific Publishing Company.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021
Y1 - 2021
N2 - In this work, we study the multifractal properties of the return intervals between fading events defined as laser intensity drops induced by optical turbulence. A laboratory-controlled experiment was conducted in which the irradiance fluctuations were recorded at a high sampling rate. Return intervals were obtained by identifying fading events under a threshold defined in times of the standard deviation of the measured irradiance. Using multifractal detrended fluctuation analysis, we found a crossover between two different scaling regimes: a spurious multifractal slightly correlated at small scales and a monofractal correlated for large scales. Based on a surrogate analysis and numerical simulations of monofractal processes, we conclude the heavy tail of the probability distribution of the return interval is the origin of the multifractality observed at small scales.
AB - In this work, we study the multifractal properties of the return intervals between fading events defined as laser intensity drops induced by optical turbulence. A laboratory-controlled experiment was conducted in which the irradiance fluctuations were recorded at a high sampling rate. Return intervals were obtained by identifying fading events under a threshold defined in times of the standard deviation of the measured irradiance. Using multifractal detrended fluctuation analysis, we found a crossover between two different scaling regimes: a spurious multifractal slightly correlated at small scales and a monofractal correlated for large scales. Based on a surrogate analysis and numerical simulations of monofractal processes, we conclude the heavy tail of the probability distribution of the return interval is the origin of the multifractality observed at small scales.
KW - Atmospheric Propagation
KW - Extreme Events
KW - Generalized Hurst Exponent
KW - Multifractality
KW - Stochastic Processes
KW - Time Series Analysis
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=85102762798&partnerID=8YFLogxK
U2 - 10.1142/S0218348X21500493
DO - 10.1142/S0218348X21500493
M3 - Article
AN - SCOPUS:85102762798
JO - Fractals
JF - Fractals
SN - 0218-348X
M1 - 2150049
ER -