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The relative total electron content (TEC) is obtained through the combination of COSMIC radio occultation ionospheric measurements L1 and L2 phase. The TEC data are then calibrated by non-occultation observation data on the auxiliary side to remove portion of TEC above the LEO orbit altitude. The electron density profile can be retrieved from TEC by Abel integral transformation,with a spherically symmetric assumption of electron density and an approximation of signal straight-line propagation. The computation standard deviation of F2-layer critical frequency f0F2 is about 059 MHz,and the standard deviation of F2-layer peak altitude hmF2 is about 3308 km,as through comparing 4903 COSMIC ionospheric occultation profiles with those from ionosonde stations,of which the longtitude deviations are less than 10°,the latitude deviations are less than 2°.
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Keywords:
- COSMIC /
- GPS/LEO radio occultation /
- ionosonde /
- ionospheric retrieval
[1] [1]Mannucci A,Wilson B,Yuan D,Ho C,Lindqwister U,Runge T 1998 Radio Sci. 33 565
[2] [2]Schreiner W S,Sokolovskiy S V,Rocken C,Hunt D C 1999 Radio Sci. 34 949
[3] [3]Lei J,Syndergaard S,Burns A G,Solomon S C,Wang W,Zeng Z,Roble R G,Wu Q,Kuo Y H,Holt J M,Zhang S R,Hysell D L,Rodrigues F S,Lin C H 2007 J. Geophys. Res. 112 A07308 doi:101029/2006JA012240
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[7] [7]Hong Z J,Guo P,Liu M,Huang C 2006 ChA&A 47 100 (in Chinese)[洪振杰、郭鹏、刘敏、黄珹 2006 天文学报 47 100]
[8] [8]Huang C S,Li J,Kelley M C 1994 Acta Phys. Sin. 43 239 (in Chinese)[黄朝松、李均、Kelley M C 1994 43 239]
[9] [9]Gu Z Y,Ji P Y 2002 Acta Phys. Sin. 51 1022 (in Chinese)[顾震宇、季沛勇 2002 51 1022]
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[1] [1]Mannucci A,Wilson B,Yuan D,Ho C,Lindqwister U,Runge T 1998 Radio Sci. 33 565
[2] [2]Schreiner W S,Sokolovskiy S V,Rocken C,Hunt D C 1999 Radio Sci. 34 949
[3] [3]Lei J,Syndergaard S,Burns A G,Solomon S C,Wang W,Zeng Z,Roble R G,Wu Q,Kuo Y H,Holt J M,Zhang S R,Hysell D L,Rodrigues F S,Lin C H 2007 J. Geophys. Res. 112 A07308 doi:101029/2006JA012240
[4] [4]Guo P,Yan H J,Hong Z J,Liu M,Huang C 2004 ChA&A 28 441
[5] [5]Zeng Z,Hu Z,Zhang X X 2004 Chinese J. Geophys. 47 578 (in Chinese)[曾桢、胡雄、张训械 2004 地球 47 578]
[6] [6]Guo P,Yan H J,Hong Z J,Huang C,Liu M 2005 ChA&A 46 96 (in Chinese)[郭鹏、严豪健、洪振杰、黄珹、刘敏 2005 天文学报 46 96]
[7] [7]Hong Z J,Guo P,Liu M,Huang C 2006 ChA&A 47 100 (in Chinese)[洪振杰、郭鹏、刘敏、黄珹 2006 天文学报 47 100]
[8] [8]Huang C S,Li J,Kelley M C 1994 Acta Phys. Sin. 43 239 (in Chinese)[黄朝松、李均、Kelley M C 1994 43 239]
[9] [9]Gu Z Y,Ji P Y 2002 Acta Phys. Sin. 51 1022 (in Chinese)[顾震宇、季沛勇 2002 51 1022]
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