2022-07-01 17:51


Conference: Bucharest University Faculty of Physics 2019 Meeting

Section: Atomic and Molecular Physics. Astrophysics. Applications

Regional Mapping of the Ionospheric Total Electron Content (TEC)

Florin-Ioan CONSTANTIN (1,2), Alexandru JIPA(2), Eugeniu Mihnea POPESCU (1), Ana CARAMETE (1), Gabriel CHIRITOI (1), Andrei Ieronim CONSTANTINESCU (1,2), Eduard NASTASE (3), Alexandra MUNTEAN (3)

1) Institute of Space Science, Magurele, Romania

2) Faculty of Physics, University of Bucharest, Romania

3) National Institute for Earth Physics, Magurele, Romania


ionosphere, TEC, map, electrons, satellite

The dual-frequency satellites of the four major Global Navigation Satellite Systems (GPS, GLONASS, Galileo and BeiDou) allow for the measurement of the total electron content of the ionosphere (TEC) using the observables and associated navigation files provided in e.g. RINEX format by dedicated ground receiving stations. The ionosphere TEC is mainly influenced by solar activity, and as such it serves as a proxy of the latter. It is important to permanently have information about the status of the TEC since any drastic changes of the electron density in the ionosphere may lead to disruptions as severe as complete signal loss of the satellite transmission. This presentation details the procedure required to determine the TEC values from all the different GNSS networks, and presents the TEC first results obtained for the GPS constellation. The procedure will be later integrated, after more processing and refinement, in an ionospheric activity monitoring system developed and hosted by the Institute of Space Science and the National Institute for Earth Physics.


1. J. Sanz-Subirana, J. M. Juan Zornoza și M. Hernández-Pajares, GNSS Data Processing. Vol. I: Fundamentals and Algorithms, Leiden: ESA Communications, 2013.

2. D. McCarthy și G. Petit, „Models for atmospheric propagation delays,” in IERS Conventions, 2013.

3. O. J. Sovers și J. L. Fanselow, „Observation Model and Parameter Partials for the JPL VLBI Parameter Estimation Software ”MASTERFIT”-1987,” JPL Publication, 1987

4. A. J. Mannucci, B. D. Wilson și D. N. Yuan, „A global mapping technique for GPS-derived ionospheric total electron content measurements,” Radio Science, vol. 33, pp. 565-582, May-June 1998.

This work was supported by a grant of the Romanian Ministery of Research and Innovation, CCCDI - UEFISCDI, project number PN-III-P1-1.2-PCCDI-2017-0266/16PCCDI/2018 , within PNCDI III.