Ionospheric electron density profiling and modeling of COSMIC follow-on simulations

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• 作者：L.-C. Tsai ; S.-Y. Su ; C. H. Liu ; S. Tulasi Ram
• 关键词：Radio occultation observation ; FS7/COSMIC2 ; Ionospheric \(N_{e}\) ; profiling ; Ionospheric \(N_e \) ; modeling
• 刊名：Journal of Geodesy
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：90
• 期：2
• 页码：129-142
• 全文大小：6,550 KB
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• 作者单位：L.-C. Tsai (1) (2)
  S.-Y. Su (1)
  C. H. Liu (3)
  S. Tulasi Ram (4)
  
  1. Center for Space and Remote Sensing Research, National Central University, Chung-Li, Taiwan, ROC
  2. Institute of Space Science, National Central University, Chung-Li, Taiwan, ROC
  3. Academia Sinica, Taipei, Taiwan
  4. Indian Institute of Geomagnetism, Navi Mumbai, India
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  Mathematical Applications in Geosciences
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1394

文摘

The FormoSat-3/ Constellation Observing System for Meteorology, Ionosphere and Climate (FS3/COSMIC) has been proven a successful mission on profiling ionospheric electron density \(( {N_e })\) using the radio occultation (RO) technique. A follow-on program (called FS7/COSMIC2) is now in progress. The FS3/COSMIC follow-on mission will have six 24\(^{\circ }\)-inclination and 550-km low Earth orbiting (LEO) satellites and six 72\(^{\circ }\)-inclination and 750-km LEO satellites to receive Tri-G (GPS, GLONASS, and Galileo) satellite signals. FS7/COSMIC2 RO observations were simulated in this study by calculating limb-viewing GNSS-to-LEO TEC values separately through two independent ionospheric models (the TWIM and NeQuick models). We propose a compensatory Abel-inversion scheme to improve vertical \(N_e \) profiling and three-dimensional (3D) \(N_e \) modeling in this FS7/COSMIC2 simulation study with future real observations. In this FS7/COSMIC2 feasibility study the number of RO observations will increase of around 10 times compared with FS3/COSMIC, and the windowing day number to collect \(N_e \) profiles and to derive every half-hour 3D \(N_e \) model could be decreased from 30 to 3 days. The results show that the root-mean-square (RMS) foF2 and hmF2 difference improvements are 46 % (32 %) and 21 % (4.6 %), respectively, in relative percentage over the standard Abel inversion at the TWIM-background (NeQuick-background) simulation experiment. The RMS modeling errors are about one order less than those from FS3/COSMIC simulations.