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The Abel inversion based on a spherical symmetry of the ionospheric electron density distribution is a traditional inversion method of ionospheric occultation. However, the real ionosphere is not strictly spherically symmetric, which can cause error in inversion process of ionospheric occultation data. In this paper, we develop a non-spherically symmetric ionospheric occultation inversion method, in which the gradient information about international reference ionosphere three-dimensional ionospheric model is used to correct total electron content (TEC), thus the ionospheric electron density can be reconstructed from the corrected TEC by the spherical symmetric Abel inversion method. The inversion results retrieved from the measurements data of Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) ionospheric occultation are compared with the ionosonde data, showing that the result obtained from the new method is well coincident with the ionospheric electron density profile.
[1] Kursinski E R, Hajj G A, Schofield T, Linfield R P, Hardy K R 1997 J. Geophys. Res. 102 23419
[2] Hajj G A, Romans J 1998 Radio Sci. 33 175
[3] [4] [5] Schreiner W S, Sokolvskiy S V, Rocken C, Douglas C 1999 Radio Sci. 34 949
[6] [7] Garcia-Fernandez M, Hernandez-Pajares M, Juan M, Sanz J 2003 J. Geophys. Res. 108 1338
[8] Hernandez-Pajares M, Juan J M, Sanz J 2000 Geophys. Res. Lett. 27 2473
[9] [10] [11] Tsai L C, Tsai W H 2004 Terr. Atmos. Ocean. Sci. 15 589
[12] [13] Wu X C, Hu X, Gong X Y, Zhang X X 2008 Chin. J. Geophys. 51 618 (in Chinese) [吴小成、胡 雄、宫晓艳、张训械 2008 地球 51 618]
[14] [15] Liu Z L, Sun X J, Fu Y 2009 Prog. Astron. 27 270 (in Chinese) [刘赵林、孙学金、符 养 2009 天文学进展 27 270]
[16] Xu X S, Hong Z J, Guo P, Liu R J 2010 Atca Phys. Sin. 59 2163 (in Chinese) [徐贤胜、洪振杰、郭 鹏、刘荣建 2010 59 2163]
[17] [18] [19] Zhang X X, Zeng Z, Hu X 2002 Chin. J. Geophys. 45 (Suppl.) 24 (in Chinese) [张训械、曾 桢、胡 雄 2002 地球 45(增刊) 24]
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[1] Kursinski E R, Hajj G A, Schofield T, Linfield R P, Hardy K R 1997 J. Geophys. Res. 102 23419
[2] Hajj G A, Romans J 1998 Radio Sci. 33 175
[3] [4] [5] Schreiner W S, Sokolvskiy S V, Rocken C, Douglas C 1999 Radio Sci. 34 949
[6] [7] Garcia-Fernandez M, Hernandez-Pajares M, Juan M, Sanz J 2003 J. Geophys. Res. 108 1338
[8] Hernandez-Pajares M, Juan J M, Sanz J 2000 Geophys. Res. Lett. 27 2473
[9] [10] [11] Tsai L C, Tsai W H 2004 Terr. Atmos. Ocean. Sci. 15 589
[12] [13] Wu X C, Hu X, Gong X Y, Zhang X X 2008 Chin. J. Geophys. 51 618 (in Chinese) [吴小成、胡 雄、宫晓艳、张训械 2008 地球 51 618]
[14] [15] Liu Z L, Sun X J, Fu Y 2009 Prog. Astron. 27 270 (in Chinese) [刘赵林、孙学金、符 养 2009 天文学进展 27 270]
[16] Xu X S, Hong Z J, Guo P, Liu R J 2010 Atca Phys. Sin. 59 2163 (in Chinese) [徐贤胜、洪振杰、郭 鹏、刘荣建 2010 59 2163]
[17] [18] [19] Zhang X X, Zeng Z, Hu X 2002 Chin. J. Geophys. 45 (Suppl.) 24 (in Chinese) [张训械、曾 桢、胡 雄 2002 地球 45(增刊) 24]
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