Deviren, M.N., Cor, I., Arikan, F. and Gulyaeva, T.L. (1)
Hacettepe University, Turkey, [email protected] (2) IZMIRAN,
Russia, [email protected] GOAL : Develop a space weather risk
index/indicator based on variability of ionospheric parameters
computed from models. Candidates : Parameters calculated from
ionospheric models. Variability of Ne, TEC, foF2, hmF2, Te, Ti,
Diffusion coefficient, D and drift velocity, Composite Model of
Current density, Conductivity, Background ionospheric electric
potential, Models : IRI-Plas, NRL-MSIS, IGRF, HWM-93 1/5
Slide 2
Conservation of charge, Quasi-neutrality, Current density
Conservation of Momentum Ambipolar diffusion coefficient and drift
velocity Transport can include diffusion, neutral winds and
vertical electromagnetic drift. Maxwells Equations: Consequence:,
Define: Composite Current Density : 2/5
Slide 3
Gradient of Ne at 250 km, IRI-Plas 3/5 where is the ratio of
gyrofrequency to collision frequency, and
The physical parameters of ionosphere, such as current density,
drift velocity, diffusion coefficient, conductivity can be computed
using ionospheric models. IRI-Plas can input GIM-TEC and update Ne,
foF2 and hmF2. Spatio-Temporal Variability over the parameter maps
can be obtained to indicate direction and magnitude of change.
Electrostatic potential can be computed from: This study is
supported by the joint grant of TUBITAK 112E568 and RFBR
13-02-91370-CT_a. References: Withers, P., Theoretical models of
ionospheric electrodynamics and plasma transport, JGR-Space
Physics, 113, A07301, 1-12, 2008. Banks, P.M., Kockarts, G.,
Aeronomy, Elsevier, New York, 1973. Rishbeth, H., Garriott, O.K.,
Introduction to Ionospheric Physics, Elsevier, New York, 1969. 6/5
Conclusion 41st COSPAR Scientific Assembly Special COSPAR C1.3 /PSW
Session Regions of the Enhanced Risk for the Ionospheric Weather
Regions of the Enhanced Risk for the Ionospheric Weather 30 July 7
August 2016, Istanbul, Turkey, MSO Feza Arikan, DO Tamara Gulyaeva.
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