Atmospheric chaoticity and complexity from radio refractivity derived from Akure station
作者： BO Ogunsua , JS Ojo , AT Adediji , None
DOI: 10.1016/J.ASR.2018.06.035
关键词:
摘要: Abstract Understanding the hidden dynamics of atmosphere and its effect on radio wave propagation is paramount. Therefore proper characterization atmospheric especially for annual seasonal variation necessary. In this paper, weather parameters (pressure, relative humidity temperature), were used to obtain refractivity at surface N s level, 100 m height, 100 differential dN / dH . The extracted characterized based chaoticity dynamical complexity, Akure meteorological station (7°15′9.22″N, 5°11′35.23″E). data analysis has been Combined application Largest Lyapunov Exponent Tsallis Entropy (CLLETE). sets year 2011 2012 have computation. It was observed that CLLETE follow similar trend in most cases, exponent generally positive indicating presence chaos all sets. further revealed pattern complexity variations a from July December with values computed S having huge departure other two heights lower values. However, beginning June. Chaos also show following same between December. This indicates response varying conditions.
harvard.edu
sci-hub.se 参考文章(32)
Georgios Balasis, Ioannis A. Daglis, Constantinos Papadimitriou, Maria Kalimeri, Anastasios Anastasiadis, Konstantinos Eftaxias, Dynamical complexity in Dst time series using non‐extensive Tsallis entropy Geophysical Research Letters. ,vol. 35, ,(2008) , 10.1029/2008GL034743
Georgios Balasis, Ioannis A. Daglis, Constantinos Papadimitriou, Maria Kalimeri, Anastasios Anastasiadis, Konstantinos Eftaxias, Investigating dynamical complexity in the magnetosphere using various entropy measures Journal of Geophysical Research: Space Physics. ,vol. 114, pp. n/a- n/a ,(2009) , 10.1029/2008JA014035
K. Unnikrishnan, A comparative study on chaoticity of equatorial/low latitude ionosphere over Indian subcontinent during geomagnetically quiet and disturbed periods Nonlinear Processes in Geophysics. ,vol. 17, pp. 765- 776 ,(2010) , 10.5194/NPG-17-765-2010
Yamina Bettouche, Basile L. Agba, Ammar B. Kouki, Geoclimatic factor and point refractivity evaluation in Quebec-Canada ursi general assembly and scientific symposium. pp. 1- 4 ,(2014) , 10.1109/URSIGASS.2014.6929621
Peter Grassberger, Itamar Procaccia, Measuring the strangeness of strange attractors Physica D: Nonlinear Phenomena. ,vol. 9, pp. 189- 208 ,(1983) , 10.1016/0167-2789(83)90298-1
A.A Willoughby, T.O Aro, I.E Owolabi, Seasonal variations of radio refractivity gradients in Nigeria Journal of Atmospheric and Solar-Terrestrial Physics. ,vol. 64, pp. 417- 425 ,(2002) , 10.1016/S1364-6826(01)00111-0
Matthew B. Kennel, Reggie Brown, Henry D. I. Abarbanel, Determining embedding dimension for phase-space reconstruction using a geometrical construction Physical Review A. ,vol. 45, pp. 3403- 3411 ,(1992) , 10.1103/PHYSREVA.45.3403
L.P. Karakatsanis, G.P. Pavlos, M.N. Xenakis, Tsallis non-extensive statistics, intermittent turbulence, SOC and chaos in the solar plasma. Part two: Solar flares dynamics Physica A-statistical Mechanics and Its Applications. ,vol. 392, pp. 3920- 3944 ,(2013) , 10.1016/J.PHYSA.2013.05.010
Andrew M. Fraser, Harry L. Swinney, Independent coordinates for strange attractors from mutual information Physical Review A. ,vol. 33, pp. 1134- 1140 ,(1986) , 10.1103/PHYSREVA.33.1134
Holger Kantz, A robust method to estimate the maximal Lyapunov exponent of a time series Physics Letters A. ,vol. 185, pp. 77- 87 ,(1994) , 10.1016/0375-9601(94)90991-1