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Comparison of IRI-2012 and Rapid GIMs With GNSS-Derived TEC Over China

  • Yan XiangEmail author
  • Yunbin Yuan
  • Ningbo Wang
Conference paper
  • 1.5k Downloads
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 304)

Abstract

The ionospheric delay is one of the predominant errors limiting the accuracy of Global Navigation Satellite Systems (GNSS), especially for single-frequency users. Meanwhile the IGS (International GNSS Service) Ionospheric Working Group and International Reference Ionosphere play an essential role in promoting ionospheric studies. This contribution will analyze the performance of IGS rapid Global Ionospheric Maps (GIMs) and the latest version International Reference Ionosphere model IRI-2012 aiming to provide more valid ionospheric correction in China. Three pairs of stations from CMONOC (Crustal Movement Observation Network of China) in 2013 are employed to analyze the discrepancy between rapid GIMs, IRI-2012 and GNSS-derived TEC. Results show that the rapid GIMs and IRI-2012 have distinct difference from GPS-derived TEC both in daytime and nighttime. In terms of rapid GIMs, the performance over IGS stations is generally better than those are non IGS stations, with pronouncedly better accuracy of about 20 and 50 % in daytime and nighttime respectively with respect to GNSS-derived TEC. Moreover, IRI-2012 is likely to overestimate TEC value in daytime, and underestimate TEC value in nighttime.

Keywords

Rapid GIM IRI-2012 GNSS-derived TEC Ionosphere 

Notes

Acknowledgments

We thank CDDIS (Crustal Dynamics Data Information System), IGS and COMNOC to allow us to use their data set to finish our research. This research was supported by National 973 (No. 2012CB825604) and 863 programs (No. 2012AA121803), China Natural Science Funds (No. 41304034, 41231064, 41104012 and 41021003), and the CAS/SAFEA International Partnership Program for Creative Research Teams (KZZD-EW-TZ-05).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Institute of Geodesy and GeophysicsState key laboratory of Geodesy and Earth’s dynamics, Chinese Academy of SciencesWuhanChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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