Studying the Relationship between the Maximum Electron Density with the Critical Frequency in the Ionospheric E-Layer over Kirkuk City During the Solar Cycle 24
Kirkuk University Journal-Scientific Studies,
2022, Volume 17, Issue 4, Pages 8-26
AbstractThis research aims to study the relationship between the values of electron density (NmE) and the critical frequency (fo E) of ionospheric E layer over Kirkuk city (lon: 44° E, lat: 35° N) which was obtained through the use of the International Reference Ionosphere (IRI2016) publication on the website (https://ccmc.gsfc.nasa.gov/modelweb/models/iri2016_vitmo.php) during the years (2008, 2014, 2018), which represents each (ascending phase, peak, desending phase) for the solar cycle 24, and in dates (22December, 20March, 20June and 22Semtember) which represent the days of (Winter solstice, Spring equinox, Summer solstice, Autumn equinox) respectively.
In this research, the nature of the relationship between the values of electron density (NmE) and the critical frequency of ionospheric E (fo E) layer were explained by description of hourly changes and calculating the correlation coefficient between the two variables by using Microsoft Excel (2010).
The results indicated that there is a strong linear correlation between both variables where the values of correlation coefficients ranged between (0.984) – (0.998), and this indicates that with the increase in electron density the critical frequency increase, and vice versa.
 Ali Ahmed Ghanem. Applied Climate , ”In Arabic”. Dar Al-Masira, Department of Geography, University of Jordan, 1st edition, 2010.
 Ali Hassan Mousa and Abdel Karim Shehadeh. Natural Climatology, ”In Arabic”. Department of Geography, Faculty of Arts and Humanities, Tishreen University, Syria., 2009.
 L. Philipe and J.M. Fandmarray. Chemistry of the atmosphere. academic press ,New Zealand., 1975.
 I. S. Batista and M. A. Abdu. Ionospheric variability at brazilian low and equatorial latitudes: comparison between observations and iri model. Advances in Space Research, 34:1894–1900, 2004.
 D. Bilitza, O. K. Obrou, J. O. Adeniyi, and O. Oldaipo. Variavbility of fof2 in the equatorial ionosphere. Advances in Space Research, 34:1901–1906, 2004.
 A. O. Akala, E. O. Somoye, A. B. Adeloye, and A B. Rabiu. Ionospheric fof2 variability at equatorial and low latitudes during high, moderate and low solar activity. Indian Journal of Radio Space Physics, 40:124–129, 2011.
 H. Rishbeth. Basic physics of the ionosphere : A tutorial review. Journal of the Institution of Electronic and Radio Engineers, 58:207–223, 1988.
 J.C. Brand. Introduction to the Solar Wind. W.H. Freeman and Company, 1st edition, 1970.
 R. Chipman. The World in space. pentic Hall, united nation, 1st edition, 1982.
 T. Beer. The Aerospace Environment. keham publications, London, 1st edition, 1976.
 L. Liu Y. Chen and W. Wan. Does the f10.7 index correctly describe solar euv flux during the deep solar minimum of 2007–2009. Journal of Geophysical Research, 116:A04304, 2011.
 L. Aller. Astrophysics. The Atmosphere of sun and stars. the Ronald press Company, New York, 1st edition, 1963.
 W. K. Tobiska, T. N. Woods, F. G. Eparvier, R. Viereck, L. Floyd, D. Bouwer, G. J. Rottman, and O. R. White. The solar2000 empirical solar irradiance model and forecast tool. Journal of Atmospheric and Solar-Terrestrial Physics, 62:1233–1250, 2000.
 J. K. Hargreaves. The Upper Atmosphere and Solar Terrestrial Relation. Van Notrandreinhold Company, 1th edition, 1979.
 B. Zolesi and L. R. Cander. Ionospheric Prediction and Forecasting. Springer Geophysics, 2014.
 Khalid A. Hadi and Asma’a A. Hamied. Investigating the influence of solar activity on the ionospheric critical frequency over iraqi region (a case study). Science International, 31(1):49–55, 2019.
 Wafaa Hasan Zaki, Rwziah Mahmood Mohammed, and Jawdet Hidayat. The effect of sunspots number on the total electron content (tec) of the ionospheric layer e over kirkuk station for solar cycle 24. Kirkuk University Journal-Scientific Studies, 15(1):1–17, 2020.
 Elaf Farhad Bakr, Wafaa Hasan Zaki, and Jawdet Hidayat. The effect of sunspots number on critical frequencies fof2 for the ionospheric layer-f2 over kirkuk city during the ascending phase of solar cycle 24. Kirkuk University Journal-Scientific Studies, 16(3):19–27, 2021.
 Asma’a A. Hamied and Khalid A. Hadi. Annual behavior of maximum electron density and critical frequency parameters during maximum and minimum years of solar cycles 22, 23 and 24. Journal of Physics: Conference Series, 1818:1–1, 2021.
 https://ccmc.gsfc.nasa.gov/modelweb/ models/iri2016_vitmo.pph.
 https://spdf.gsfc.nasa.gov/research/ IRI/website/doc.
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