Seasonal Variations of Impedance in the Ionospheric Plasma

The ionosphere is an ionized layer that extends between 50 km and 1000 km altitudes in the atmosphere. It plays an important role in atmospheric electricity. The ionosphere has the number of electrically charged particles and thus, it affects the propagation of the radio waves. In this study, magnitudes of impedance for different seasons and different geomagnetic activity periods in the ionospheric plasma are calculated using the real geometry of Earth. It is observed that the impedance of the ionospheric plasma in all directions generally has high values for all seasons. The diagonal components of the tensor of the impedance are greater than the other components. It is also observed that the ionospheric plasma, generally, has weak conductivity in all directions and seasons. Impedance varies inversely with electron density. Hence, geomagnetic activity periods which lead to an increase in electron density decreases the impedance. It is observed that the ionospheric plasma has a reactive character in the geographic coordinates where the study was performed. The ionosphere displays a dielectric structure.

Seasonal Variations of Impedance in the Ionospheric Plasma

The ionosphere is an ionized layer that extends between 50 km and 1000 km altitudes in the atmosphere. It plays an important role in atmospheric electricity. The ionosphere has the number of electrically charged particles and thus, it affects the propagation of the radio waves. In this study, magnitudes of impedance for different seasons and different geomagnetic activity periods in the ionospheric plasma are calculated using the real geometry of Earth. It is observed that the impedance of the ionospheric plasma in all directions generally has high values for all seasons. The diagonal components of the tensor of the impedance are greater than the other components. It is also observed that the ionospheric plasma, generally, has weak conductivity in all directions and seasons. Impedance varies inversely with electron density. Hence, geomagnetic activity periods which lead to an increase in electron density decreases the impedance. It is observed that the ionospheric plasma has a reactive character in the geographic coordinates where the study was performed. The ionosphere displays a dielectric structure.

___

  • Zhang, D.Y. “New method of calculating the transmission and reflection coefficients and fields in a magnetized plasma layer”, Radio Science, 26(6), 1415-1418, (1991).
  • Lundborg, B., Thide, B. “Standing wave pattern of HF radio waves in the ionospheric reflection regions 2. applications,” Radio Science, 21, 486-500, (1986).
  • Ratcliffe J.A. “The Magneto-ionic Theory and Its Applications to the Ionosphere”, Cambridge University Press, (1959).
  • Rishbeth, H. Garriott, O.K. “Introduction to Ionospheric Physics” Academic Press, (1969).
  • Budden, K.G. “The Propagation of Radio Waves”, Cambridge University Press, (1988).
  • Aydogdu, M. Ozcan, O. “Effects of magnetic declination on refractive index and wave polarization coefficients of electromagnetic waves in mid-latitude ionosphere”, Indian Journal of Radio and Space Physics, 25, 263-270, (1996).
  • Hagfors, T. “Electromagnetic wave propagation in a field-aligned-striated cold magnetoplasma with application to the ionosphere”, Journal of Atmospheric Solar-Terrestrial Physics, 46(3), 211-216, (1984).
  • Al’pert Ya.L. “The direction of the group velocity of electromagnetic waves in a multicomponent magneto-active plasma in the frequency range 0<<”, Journal of Atmospheric Solar-Terrestrial Physics, 42(3), 205-216, (1980).
  • Aydogdu ,M., Yesil, A., Guzel E. “The group refractive indices of HF waves in the ionosphere and departure from the magnitude without collisions”, Journal of Atmospheric Solar-Terrestrial Physics 66(5), 343-348, (2004).
  • Atac, T., Ozguc, A., Pektas, R. “The variability of foF2 in different phases of solar cycle 23”, Journal of Atmospheric Solar-Terrestrial Physics 71(5), 583-588, (2009).
  • Aydogdu, M., Guzel, E., Yesil, A., Ozcan, O. Canyilmaz, M. “Comparison of the calculated absorption and the measured field strength HF waves reflected from the ionosphere”, Il Nuovo Cimento C, 30(3), 243-253, (2007).
  • Inan, U.S., Inan, A.S. “Electromagnetic Waves”, Prentice Hall, (2000).
  • Sturrock, P.A. “Plasma Physics”, Cambridge University Press, (1996).
  • Orfanidis, S.J. “Electromagnetic Waves and Antennas”, Rutgers University Press, (2004).
  • Baker, W.G. Martyn, D.F. “Electric currents in the ionosphere. I. The conductivity”, Philosophical Transactions of the Royal Society A, Mathematical Physical and Engineering Sciences, 246(913), 281-294, (1953).
  • Yesil, A. Unal, I. “Behaviour of Electromagnetic Waves in Different Media and Structures”, InTech, (2011).
  • Aydogdu, M., Ozcan, O. “The possible effects of the magnetic declination on the wave polarization coefficients at the cutoff point”, Progress in Electromagnetics Research-PIER, 30, 179-190, (2001).
  • Blioh, P.V., Nikolaenko A.P., Pilippov Yu.F. “Global'nye Èlektromagnitnye Rezonansy V Polosti Zemlâ-Ionosfera”, Naukova Dumka, (1977).
  • Whitten R.C., Poppoff, I.G. “Fundamentals of Aeronomy”, John Wiley & Sons Inc., (1971).
Politeknik Dergisi-Cover
  • ISSN: 1302-0900
  • Yayın Aralığı: Yılda 4 Sayı
  • Başlangıç: 1998
  • Yayıncı: GAZİ ÜNİVERSİTESİ
Sayıdaki Diğer Makaleler

Constitutive Modeling of Monotonic Behavior of Clays: Mathematical Formulation, Numerical Implementation and Experimental Verification

Mehmet Barış Can ÜLKER

İyonosferik Plazmadaki Empedansın Mevsimsel Değişimi

İbrahim ÜNAL, Aybaba HANÇERLİOĞULLARI, Seçil KARATAY, Ali YEŞİL

Analysis, Test and Management of the Meta-Heuristic Searching Process: An Experimental Study on SOS

Hamdi Tolga KAHRAMAN, Sefa ARAS, Yusuf SÖNMEZ, Uğur GÜVENÇ, Eyüp GEDİKLİ

InGaN/GaN Yapılar için XRD-Raman Karşılaştırması

Ahmet Kürşat BİLGİLİ, Ömer AKPINAR, Mustafa Kemal ÖZTÜRK, Süleyman ÖZÇELİK, Ekmel ÖZBAY

Yenilenebilir Enerji Kaynaklarına Sahip Bir Evin Talep Karakteristiğine Uygun Bir İnverter Tasarımının İncelenmesi

Uğur S. SELAMOĞULLARI

Evaluation of Applicability of Thermophotovoltaic System in Combi Boiler

Barış İŞYARLAR, TAYFUN MENLİK

Killerin Statik Bünye Davranışlarının Modellenmesi: Matematiksel Formülasyon, Sayısal Uygulama ve Deneysel Doğrulama

Mehmet Barış Can ÜLKER

B4C/SiC Katkılı Alüminyum Esaslı Kompozitlerin Mekanik Özelliklerin İncelenmesi ve Balistik Performanslarının Modellenmesi

Muharrem PUL, Volkan BAYDAROĞLU

Bir Döküm Atölyesindeki Çalışma Duruşlarının Dijital İnsan Modelleme Tabanlı REBA Yöntemi ile Ergonomik Analizi

Fulya ERDEMIR, Cengiz ELDEM

Current Operational Amplifier Based Voltage-Mode MOS-C All-Pass Filter and Its Application

Hasan ÇİÇEKLİ, İhsan KARACAN, Ahmet GÖKÇEN