Rise up, 2021!

Ultra Global TEC Maps ››

Running Log

  • 2021-10-28,03:30:01@IRIS is beginning to process global GNSS data on 10/27,2021(DOY:300).
  • 2021-10-28,03:30:02@IRIS is starting to download ephemeris and GNSS data.
  • 2021-10-28,04:23:22@Data are downloaded. Time consumption:53.346 minutes.
  • 2021-10-28,04:24:50@Preprocessing is done. Time consumption:1.4530 minutes.
  • 2021-10-28,04:53:22@Data processing is completed. Time consumption:28.534 minutes.
  • 2021-10-28,04:53:22@Well done. Total consumption:83.349 minutes. IONEX products and web pages will be updated in a few minutes.
  • 2021-10-28,04:53:38@IRIS completed product visualization.
  • 2021-10-28,04:53:40@IRIS just pushed the latest products and updated the web pages.
  • 2021-10-28,04:53:40@Job super is finished. by IRIS 2.0

Run Time Statistics

Precision (Unit:TECU)

Sigma Mean residuals STD residuals RMS residuals
2.466 -0.004 3.367 3.367

Global TEC Maps (Unit:TECU)


Global TEC Maps (Unit:TECU)

Satellite DCB (Unit:ns)


Frequency Distribution of Residuals (Unit:%)


Frequency Distribution of Absolute Residuals (Unit:%)


Frequency Distribution of Observed Satellites (Unit:%)




  • Wang, C., C. Shi*, H. Zhang and L. Fan, Improvement of global ionospheric VTEC maps using the IRI 2012 ionospheric empirical model, Journal of Atmospheric and Solar-Terrestrial Physics Vol. 146, 2016, pp. 186-193.

  • Wang, C.*, Shi, C.*, Fan, L., & Zhang, H. Improved Modeling of Global Ionospheric Total Electron Content Using Prior Information. Remote Sensing, 2018, 10(1), 63.

  • Roma-Dollase, D., M. Hernández-Pajares*, A. Krankowski, K. Kotulak, R. Ghoddousi-Fard, Y. Yuan, Z. Li, H. Zhang, C. Shi and C. Wang, et al. Consistency of seven different GNSS global ionospheric mapping techniques during one solar cycle. Journal of Geodesy, 2017.11 (4):1432-1394.


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Our work is conducted as a part of the International Association of Geodesy (IAG) working group 4.3.1 "Real-time Ionosphere Monitoring and Modelling" and working group 4.3.2 "Prediction of ionospheric state and dynamics".

Address: Room 103, International School, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing, 100083, P.R. China

Email: ac@ionosphere.cn

Phone: +86 16601168599


Focus and concentration on studying ionospheric models. Implementation service of ionospheric delay correction for satellite navigation and wide-area, local-area augmentation system. A basis paltform for exploring the change rules and physical mechanism of the ionosphere.

To understand the structure and change rules of the ionosphere; To reduce the space environment risk of satellite lauch; To improve the performance of satellite navigation system and radar; To increase the reliability of radio communications; To strengthen early warning and forecasting of earthquake and tsunami.