Annual Mean and Correlation of Global Vertical Total Electron Content from Various Global Data Centers
American Journal of Astronomy and Astrophysics
Volume 8, Issue 1, March 2020, Pages: 1-7
Received: Nov. 21, 2019;
Accepted: Dec. 31, 2019;
Published: Jan. 21, 2020
Views 437 Downloads 135
Shambel Gizachew, Physics Department, Dire Dawa University, Dire Dawa, Ethiopia
Belay Sitotaw, Physics Department, Dire Dawa University, Dire Dawa, Ethiopia
Gizaw Mengistu, Physics Department, Addis Ababa University, Addis Ababa, Ethiopia
The main purpose of this work is to evaluate the annual mean correlations of vertical total electron content provided by GPS, Center for Orbit Determination in Europe (CODE), Jet Propulsion Laboratory (JPL), Polytechnical University of Catalonia (UPC) and European Space Agency (ESA) data centers. The comparisons are aimed at comparability of the different vertical total electron content (VTEC) data sets in terms of times variabilities globally. The Annual mean comparison of these global vertical total electron content are as expected results and also the agreements between the different VTECs from the given data centers also assessed from correlation maps is very good as reflected in correlation exceeding 0.98 among the different data sets with the exception of ESA VTEC. Moreover, the result shows that a distinct feature which exhibit by all data sets is presence of peak VTEC along equatorial latitude belt which fades out with increase in latitude.
Annual Mean and Correlation of Global Vertical Total Electron Content from Various Global Data Centers, American Journal of Astronomy and Astrophysics.
Vol. 8, No. 1,
2020, pp. 1-7.
Ivanov-Kholodny, G. S., Nikolsky, G. M., 1969. The sun and ionosphere. Nauka, Moskow.
Akasofu S.-I, Chapman S. (1972), Solar Terrestrial Physics. Oxford University Press, Oxford alan N, Bailey GJ, Abdu MA, Oyama KI, Richards PG, MacDougall J, Batista IS (1997) Equatorial plasma fountain and its effects over three locations: evidence for an additional layer, the F3 layer. J Geophys Res 101: 20472056.
Krinberg, I. A., Taschilin, A. V., 1984. Ionosphere and Plasmosphere. Nauka, Moscow. Leitinger, R., Zhang, M., Radicella, S. M., 2005. An improved bottomside for the ionospheric electron density model NeQuick, Annals of geophysics 48 (3), 525-534.
Bryunelli, B. E., Namgaladze, A. A., (1988). Physics of the Ionosphere. Nauka, Moscow.
DasGoupta, A, Paul A., and Das A., (2007), Ionospheric total electron content studies with GPS in the equatorial region, Indian Journal of Radio and Space physics, 36, 278-293.
Kelley, Michael C.(1989), The Earths Ionosphere: Plasma Physics and Electrodynamics, Academic Press.
SCHAER, S.; Markus; R. Gerhard; B. Timon, A. S., (1996). Daily Global Ionosphere Maps based on GPS Carrier Phase Data Routinely produced by the CODE Analysis Center, Proceeding of the IGS Analysis Center Workshop, Silver Spring, Maryland, pp. 181-192, USA.
Arikan, F., Erol, C. B., Arikan, O (2003). Regularized estimation of vertical total electron content from Global Positioning System data. J. Geophys. Res.-Space Phys. 108 (A12), 1469–1480.
Arikan, F., Arikan, O., Erol, C. B., (2007), Regularized estimation of TEC from GPS data for certain mid latitude stations and comparison with the IRI model, Advances in Space Research, 39, 867–874.
Guo, J, Li W, Liu X, Kong Q, Zhao C, Guo B., (2015). Temporal-Spatial Variation of Global GPS Derived Total Electron Content, 1999–2013. PLoS ONE 10 (7): e0133378. Doi: 10.1371/journal.
Natali, M. P. and Meza A, (2011). Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations, Ann. Geophysics., 29, 865–873.
Xu, JS, Li XJ, Liu YW, Jing M., 2003. Effects of declination and thermospheric wind on TEC longitude variations in the mid-latitude ionosphere. Chinese Journal of Geophysics; 56: 1425–1434. doi: 10.6038/cjg20130501.
Mallis, M, Essex EA., (1993). Diurnal and seasonal variability of the southern-hemisphere main ionospheric trough from differential-phase measurements. Journal of Atmospheric and Terrestrial Physics; 55: 1021–1037.
Liu LB, Wan WX, Ning BQ, Zhang ML, (2009). Climatology of the mean total electron content derived from GPS global ionospheric maps. Journal of Geophysical Research; 114: A06308. doi: 10.1029/2009JA014244.
Bothmer, V. and I. A. Daglis (2007), Space Weather: Physics and Effects, 213, 315-318, 438 pp., Praxis Publishing Ltd., Chichester, UK.
Klobuchar, J. A., (1996). Global Positioning System: Theory and Applications. American Institute of Aeronautics and Astronautics, Inc., Washington DC.
Boutiouta S. and Belbachir A. H, (2006). Magnetic Storms Effects on the Ionosphere TEC through GPS Data, Information Technology Journal 5 (5), 908-915, DOI: 10.3923/itj.2006.908.915.
Mannucci, A. J., B. D. Wilson, and C. D. Edwards (1993), A new method for monitoring the Earth's ionospheric total electron content using the GPS global network, in Proceedings of ION GPS-93, the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation, Salt Lake City, UT, 22-24 September, pp. 1323-1332, The Institute of Navigation, Alexandria, Va.
Shambel Gizachew, Belay Sitotaw, Gizaw Mengistu. Comparison of Global Vertical Total Electron Content from Various Global Data Centers. International Journal of Astrophysics and Space Science. Vol. 7, No. 4, 2019, pp. 50-57. doi: 10.11648/j.ijass.20190704.12.
Zhu, AQ., (2008). Comparative study of polar ionospheric F layer in both hemispheres. Master thesis, Xi Dian University. Available: http://www.docin.com/p-119889 148.html.