Modeling the Plasma Frequency for F2-Region Using Modified Chapman Function and NeQuick2 Model over Different Geographical Locations and Months | ||
Engineering and Technology Journal | ||
Article 3, Volume 37, 2B, May 2019, Pages 45-53 PDF (933.08 K) | ||
Document Type: Research Paper | ||
DOI: 10.30684/etj.37.2B.3 | ||
Author | ||
Ali Nima | ||
Atmospheric Sciences Dept ,University of Mustansiriyah, Baghdad - Iraq | ||
Abstract | ||
This study aims to modeling the plasma frequency profile of the F2 region as a function of geographical location and month of the y ear. The most important model and function used are Chapman function and NeQuick 2 model which have been defined both by exponential function. These models need some ionospheric parameters such as the critical frequency of F2 layer (foF2), maximum peak height (hmF2), semi thickness (ymF2), and the M factor (M (3000) F2). The results of these models are compared with the results of the International Reference Ionosphere (IRI) model. For north hemisphere, the results of Chapman function has great fit with the results of IRI2012 model for low and high latitudes. For southern hemisphere the MAPE has greater values at high latitudes and drops to low latitudes. For NeQuick model, MAPE has a periodic behavior with latitudes. The monthly mean of the MAPE of the results obtained by modeling the plasma frequency profile using Chapman function and NeQuick2 model equal 0.466 and 0.259. The analysis of the MAPE for ten months gives a best correlation between the MAPE and foF2. | ||
Keywords | ||
Chapman function; Electron density; Empirical Model; F2- region; Ionosphere; NeQuick Model | ||
References | ||
[1] P. Sibanda and L.A. McKinnell, "The applicability of existing topside ionospheric models to the South Africa region", South African Journal of Science, Vol. 105, Research Letter, pp. 387-390, 2009. [2] R. C. Ljiljana, Z. Bruno and A.B. Peter, "Status of available N (h) model profiles", ANNALI DI GEOPHYSICA, XXXIX (4), pp. 729-733, 1993. [3] Guide to Reference and Standard Ionosphere Models, "Parameterized Ionospheric Model (PIM)", ANSI/AIAA, G-034-1998, Published by American Institute of Aeronautics and Astronautics, USA, P. 10.1999. [4] G.E. Rodolfo, M.D. Marta and H. Teresita, "Electron density profile modeling". ANNALI DI GEOPHYSICA, XXXIX (4), pp. 539-542, 1996. [5] M. Pietrella et al., "NeQuick2 and IRI2012 models applied to mid and high latitudes, and the Antarctic ionosphere", Antarctic Science, pp. 1-12, 2017. [6] G. Di Giovanni and S.M. Radicella, "An analytical model of the electron density profile in the ionosphere". Adv. Space Res. Vol. 10 No. 11, pp. 27–30. 1990. [7] S.M. Radicella and M.L. Zhang, "The improved DGR analytical model of electron density height profile and total electron content in the ionosphere". Annali di Geofisica XXXVIII (1), pp. 35–41, 1995. [8] S.M. Radicella and R. Leitinger, "The Evolution of the DGR Approach to Model Electron Density Profiles", Adv. Space Res. Vol. 27, No. 1, pp. 35- 40,2001. [9] L. Reinhart, M. L. Zhang and S. M. Radicella, "An improved bottomside for the ionospheric electron density model NeQuick", Annals of Geophysics, vol. 48, No. 3, June 2005. [10] B. Nava et al., "A near-real-time model-assisted ionosphere electron density retrieval method", Radio Sci., vol. 41, RS6S16, 2006. [11] B. Nava et al." A new version of the NeQuick ionosphere electron density", Journal of Atmospheric and Solar terrestrial Physics", Vol. 70, No. 15, 1856- 1862, 2008. [12] B. Benoit, L. Matthieu and W. Rene," Galileo Single Frequency ionospheric correction: Performance in terms of position", GPS solutions, Vol. 17, No. 1, January 2013. [13] Y. Xiao et al., "The Performance of ionospheric Correlation based on NeQuick2 model adaptation to Global ionospheric Maps", Advances in Space Research, Vol. 55, Issue 7, pp. 1741-1747, April 2015. [14] W. Ningbo, "An Examination of the Galileo NeQuick model: Comparison with GPS and Jason TEC", GPS solutions, Vol. 21, Issue 2, pp. 605-615, April 2017. [15] J. V. Wright, "A model of the F region above hmF2", J. Geophysics. Res., vol. 65, pp. 185–191, 1960. [16] M. W. Fox, "A simple, convenient formalism for electron density profiles", Radio Sci., vol. 29, pp. 1473- 1491, 1994. [17] B. W. Reinisch, "Tenth International Digisonde Training Seminar at UMass Lowell Reviews State of Real Time Mapping of the Ionosphere", IEEE Antennas Propagation Magazine, 45, pp. 110-117, 2004. [18] B. W. Reinisch et al. "Using scale heights derived from bottomside ionograms for modeling the IRI topside profile", Adv. Radio Sci., 2, pp. 293-297, 2004. [19] M. L. Zhang et al. "Results of the modeling of the topside electron density profile using the Chapman and Epstein function", Adv. Space Res., vol. 29, pp. 871– 876, 2002. [20] J.L. Lei et al. "A statistical study of ionospheric profile parameters derived from Millstone Hill incoherent scatter radar measurements", Geophysics Research Letter, 31, L14804, 2004. [21] J. L. Lei et al., "Variations of electron density based on long-term incoherent scatter radar and Ionosonde measurements over Millstone Hill", Radio Sci., 40, RS2008, 2005. [22] R. G. Ezquer et al., "Predicted and measured total electron content at both peaks of the equatorial anomaly", Radio Sci., vol. 29, pp. 831–838, 1994. [23] R. G. Ezquer et al., "Predicted and measured total electron content over Havana", J. Atmos. Terr. Phys., vol. 59, pp. 591–596, 1997. [24] B. W. Reinisch and X. Huang, "Deducing topside profiles and total electron content from bottomside ionograms", Adv. Space Res., 27, pp. 23–30, 2001. [25] X. Huang and B. W. Reinisch, "Vertical electron content from ionograms in real time", Radio Sci., vol. 36, pp. 335–342. 2001. [26] A. Belehaki et al., "Comparison of ionospheric ionization measurements over Athens using ground Ionosonde and GPS-derived TEC values, Radio Sci., vol. 38, No. (6), 1105, 2003. [27] B. W. Reinisch et al., "Using scale heights derived from bottomside ionograms for modeling the IRI topside profile", Adv. Radio Sci., vol. 2, pp. 293-297, 2004. [28] X. Luan et al., "Climatology of the F-layer equivalent winds derived from Ionosonde measurements over two decades along the 120o -150o E-sector", Ann. Geophysics, vol.22, pp. 2785–2796, 2004. [29] L. Liu et al., "Solar activity variations of equivalent winds derived from global Ionosonde data", J. Geophysics. Res., vol. 109, A12305, 2004. [30] S. M. Stankov, "A new method for reconstruction of the vertical electron density distribution in the upper ionosphere and plasmasphere", J. Geophysics. Res., 108(A5), 1164, 2003. [31] D.N. Anderson, J.M. Forbes and M. Codrescu. "A fully analytical low and middle latitude ionospheric models". J. Geophysics. Res, a4, pp. 1520-1524, 1989. [32] Y.T. Chiu, "An improved phenomenological model of ionospheric density", Journal of atmospheric and terrestrial physics, Vol. 37: pp. 1563-1570, 1975. [33] M. S. Stanimir, J. Norbert and H. Stefan. " A new method for reconstruction of the vertical electron density distribution in the upper ionosphere and plasmasphere", J. Geophysics. Res., Vol. 108, No. A5, 1164, 2003. [34] B. Nava, P. Coısson and S.M. Radicella, "A new version of the NeQuick ionosphere electron density model". J. Atmos. And Solar Terr. Phys., Vol. 70, pp. 1856–1862, 2008 [35] M. De Gonzales and S.M. Radicella, "On a characteristic point at the base of F2 layer in the ionosphere", Adv. Space Res., Vol. 10 No. 11, pp. 17– 25, 1990. [36] R. W. Schunk and F. N. Andrew. "Ionospheres, Physics, Plasma Physics, and Chemistry". Cambridge University Press, 2nd ed., UK, Ch. 2, p. 45, 2009. [37] Y.Y. Won, C. Wenwn, S.C. Tae and M. John, "Applied Numerical Methods using Matlab", Wiley Interscience, USA, Ch.1, p. 33, 2005. | ||
Statistics Article View: 173 PDF Download: 187 |