首页|Multifractal characteristics of the low latitude equatorial ionospheric E-F valley region irregularities
Multifractal characteristics of the low latitude equatorial ionospheric E-F valley region irregularities
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NSTL
Elsevier
Ionospheric irregularities of the E-F valley region are relatively less explored with in situ experiments enabling to capture local fine structures. Here, we present the multifractal analysis of electron density fluctuations in the E-F valley region, obtained from a rocket experiment performed at equatorial low lat-itude station, Alcantara, Brazil to explore scaling structures in the plasma irregularities. The multifractal spectrum is validated with a analytical model that mimics the energy distribution in a turbulent cascade using probabilistic weights. We report the nature of the E-F valley region irregularities to be multifrac-tal, asymmetric, intermittent and non-homogeneous. The multifractal measures show transition of the influence from smaller to larger fluctuations as the rocket approaches the F layer base, consolidating ear -lier observations. By identifying the nature of the irregularities, we explore the possible cause for a wide variation reported in the spectral indices. Our analysis demonstrates the usability of the multifractal ap-proach in studying the nonlinear fluctuations observed from the E-F valley region in situ data.(c) 2022 Elsevier Ltd. All rights reserved.
Multifractal analysisEquatorial valley region irregularitiesMFDFAp ModelDETRENDED FLUCTUATION ANALYSISELECTRIC-FIELD FLUCTUATIONSSPREAD-FPLASMA IRREGULARITIESFRACTAL CHARACTERIZATIONDENSITYINHOMOGENEITIES
Neelakshi, J.、Rosa, Reinaldo R. R.、Savio, Siomel、Stephany, Stephan、de Meneses, Francisco C. C.、Muralikrishna, P.、Kherani, Esfhan Alam
NSTL
Elsevier
