Volume 7, Issue 1, February 2019, Page: 12-20
Temporal Variation of Ionospheric Scintillation in Relation with Ionospheric Total Electron Content (TEC) over Ethiopia
Antneh Gashaye Tegegne, Department of Physics, College of Natural Science, Arba Minch University, Arba Minch, Ethiopia
Received: Jun. 27, 2019;       Accepted: Jul. 22, 2019;       Published: Aug. 6, 2019
DOI: 10.11648/j.ijass.20190701.12      View  92      Downloads  17
Abstract
In this study the amplitude scintillation intensity index (S4) and ionospheric total electron content (TEC) data of the year 2012 obtained from Global Positioning System Scintillation Network and Decision (GPS-SCINDA) receiver was analyzed. The diurnal, monthly and seasonal variation of amplitude scintillation intensity index S4 and ionospheric total electron content (TEC) observed from the analyzed data. It is found that intense scintillation occurred during the day time with a small frequency and very frequent occurrences of relatively moderate scintillation during the night time but the vertical total electron content weak at night time than day time. it is observed that ionospheric scintillation intensity index in March, April, February, September– December recorded scintillation events at moderate and intense levels, and these events were generally localized within 1930 LT–2400 LT and All other months experienced weak scintillation of various degrees of occurrences. The scintillation showed a seasonal variation characterized by intense values in March equinox compare to that of in June solstice season. The diurnal variations of amplitude scintillation intensity index S4 in relation with TEC showed that there is more scintillation and TEC around 15:00 to 20:00 UT and this is may be due to the enhancement of equatorial spread F and formation of plasma bubble during the night.
Keywords
Ionospheric Total Electron Content (TEC), Amplitude Scintillation Intensity Index (S4), Scintillation
To cite this article
Antneh Gashaye Tegegne, Temporal Variation of Ionospheric Scintillation in Relation with Ionospheric Total Electron Content (TEC) over Ethiopia, International Journal of Astrophysics and Space Science. Vol. 7, No. 1, 2019, pp. 12-20. doi: 10.11648/j.ijass.20190701.12
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Emirant Bertillas Amabayo, Multi-instrument observations of ionosphericirreg-ularities over South Africa, Masters thesis, 2011.
[2]
J. K. Hargreaves, R. D. Hunsucker, The high-latitude ionosphere and its effects on radio propagation, p. 244-249.
[3]
Schunk, R. W. and A. F. Nagy, Ionospheres, Physics, Plasma physics and Chem- istry. Cambridge, Atmospheric and Space science series, 2005.
[4]
J. O. Olwendo, P. J. Cilliers, P. Baki, C. Mito, Using GPS-SCINDA observations to study the correlation between scintillation, total electron content enhancement and depletions over the Kenyan region, Advances in Space Research vol 49, 2012.
[5]
Klobuchar, J. A., Global Positioning System: Theory and Applications, Volume I, Progress in Astronautics and Aeronautics, vol. 163, Chapter 12, pp. 485-515, 1996.
[6]
Klobuchar, J. A., Ionospheric Effects on GPS, GPS World, pp. 48-51, April 1991. Koleva R. Sauvaud J. -A., Plasmas in the near Earth magnetotail lobes: Properties and sources, J. Atmos. Terr. Phys., pp. - 2118-2131. - Vol. 70, 2008.
[7]
Aarons, J. A., Equatorial Scintillations: A Review, IEEE Transactions on Antennas and Propagation, vol. AP-25, No. 5, pp. 729-736, 1977.
[8]
Anita Aikio and Tuomo Nygren, 761658 S IONOSPHERIC PHYSICS, Department of Physical Sciences, University of Oulu, 2008.
[9]
C. E. Valladaras, J. Villalobos, R. Sheehan and M. P. Hagan, Latitudinal exten- sion of low-latitude scintillations measured with a network of GPS receivers, Ann. Geophysicae, vol. 22, pp. 3155-3175, 2004.
[10]
Maruyama, T. Ionosphere and Thermosphere. Journal of the Communications Research Laboratory, 49 (3): 163-179, 2002.
[11]
Paschmann G., Haerendel G., Sckopke N. Rosenbauer H., Plasma and Magnetic Field Characteristics of the Distant Polar Cusp Near Local Noon: The Entry Layer, J. Geophys. Res., pp. - 16: Vol. 81, 1976.
[12]
Piddington J. H., Twists and rotations of solar magnetic fields, Astrophysics and Space Science, p. 273-287: Vol. 75, 1980.
[13]
Pr¨olsGerd W. Physics of the Earth’s Space Environment An Introduction. - Berlin Heidelberg: Springer, 2004.
[14]
Richardson John D., PaularenaKarolen I., Lazarus Alan J. Belcher John W., Radial evolution of the solar wind from IMP 8 to Voyager 2, Geophys. Res. Lett., p. 325-328. - 4: Vol. 22, 1995.
[15]
A. Gil, M. V. Alania, Advances in Space Research 45 (2010) 429436.
[16]
A. Gil, R. Modzelewska, M. V. Alania, ACTA PHYSICA POLONICA B Vol. 39 (2008) No 5.
[17]
Kenneth Davies, Ionospheric Radio, Peter Peregrinus Ltd, United Kingdum, May 1989.
[18]
http://www.ngdc.noaa.gov/ngdc.html, December 3, 2011.
[19]
D. K. Sharma, J. Rai1, M. Israil, P. Subrahmanyam, P. Chopra, and S. C. Garg, Annales Geophysicae (2004) 22: 20472052 SRef-ID: 1432-0576/ag/2004-22-2047
[20]
Secchi A. Le Soleil. - Paris: Gauthier-Villars, p. 1875-1877. - Vol. 1 2.
[21]
Sheeley N. R., Walters J. H,, Wang Y. M. Howard R. A., Continous tracking of coronal outflows: Two kinds of coronal mass ejections, J. Geophys. Res. -Space Physics, p. 24739-24767. - A11: Vol. 104, 1999.
[22]
Suvorova A. V., Dimitriev A. V. Kuznetsov S. N., Dayside magnetosphere mod- els, Radiation Measurements, pp. - 687-692. - 5: Vol. 30, 1999.
[23]
Swarzschild M., On noise arising from the solar granulation, Astrophys. J., p. - 1: Vol. 107, 1948.
[24]
Robert W. Schunk and Andrew F. Nagy, IONOSPHERES, Physics, Plasma Physics, and Chemistry, Second Edition, 2000 (2009).
[25]
Song Y. Lysak R. L., Some Theoretical Aspects of the Solar Wind- Magneto- spheric Interaction, Phys. Chem. Earth, pp. - 715-721. - 7-8: Vol. 22, 1997.
[26]
Levine R. H., Altschuler M. D. Harvey J. W., Solar ources of the Interplanetary Magnetic Field and Solar Wind, J. Geophys. Res., p. - 7: Vol. 82, 1977 b.
[27]
Levine R. H., Altschuler M. D., Harvey J. W. Jackson B. V., Open Magnetic Structures On The Sun, Astrophys. J., p. 636-651. Vol. 215, 1977 a.
[28]
Lundin R. Dubinin E., Solar Wind Energy Transfer Regions Inside The Day- side Magnetopause- I. Evidence For Magnetosheath Plasma Penetration, Planetary Space Sciences, p- 745-755. - 6: Vol. 32, 1984.
Browse journals by subject