Special Issue: Application of GPS and other space geodetic techniques to Earth Sciences (2)
- Open Access
The increase of the ionospheric activity as measured by GPS
Earth, Planets and Space volume 52, pages 1055–1060 (2000)
The paper outlines a method allowing to compute the TEC with a precision of about 2–3 TECU and to detect Travelling Ionospheric Disturbances using GPS measurements. We describe the solar cycle dependance of the TEC and TIDs. Since the beginning of 1998, we have observed a stronger ionospheric activity due to the increasing solar activity. This ionospheric activity is characterized by larger TEC values which are regularly reaching the level of 60 TECU and by a larger number of Travelling Ionospheric Disturbances. During the winter 1999–2000, the mean daily TEC was above 45 TECU; at solar minimum the mean daily TEC is ranging from 4 TECU to 12 TECU. In January 2000 (close to solar maximum) more than 1300 events due to TID’s were detected: it is 6.5 more than in January 1996 (at solar minimum).
da Rosa, A. V., H. Waldman, J. Bendito, and O. K. Garriott, Response of the ionospheric electron content to fluctuations in solar activity, J. Atmos. Terr. Phys., 35, 1429–1442, 1973.
Dehant, V. and P. Pâquet, Modeling of the apparent height variations of a tranet station, Bulletin Géodésique, 57, 354–364, 1983.
Feitcher, E. and R. Leitinger, A 22-year cycle in the F layer ionization of the ionosphere, Ann. Gephysicae, 15, 1015–1027, 1997.
Lanyi, G. E. and T. Roth, A comparison of mapped and measured total ionospheric electron content using global positioning system and beacon satellite observations, Radio Sci., 23, 483–492, 1988.
Sleewaegen, J.-M., Surge Anomaly in Cross-Correlated GPS measurements: Description and Analysis, Navigation, 46(2), 119–125, 1999.
Soicher, H., Traveling ionospheric disturbances (TIDs) at mid-latitudes: solar cycle phase dependence, Radio Sci., 23, 283–291, 1988.
Van Velthoven, P. J., Medium-scale irregularities in the ionospheric electron content, Ph.D. Thesis, Technische Universiteit Eindhoven, 1990.
Wanninger, L., Der Einfluß der Ionosphäre auf die Positionierung mit GPS, Ph.D. Thesis, Wissenschaftliche Arbeiten der Fachrichtung Vermessungswesen der Universität Hannover, Nr. 201, 137 pp., 1994.
Wanninger, L., E. Sardón, and R. Warnant, Determination of the Total Ionospheric Electron Content with GPS—Difficulties and their Solution, Proceedings of Beacon Satellite Symposium ’94, edited by Dpt. of Physics of University of Aberystwyth, 13–16, 1994.
Warnant, R., Etude du comportement du Contenu Electronique Total et de ses irrégularités dans une station de latitude moyenne. Application aux calculs de positions relatives par le GPS, Ph.D. Thesis (in French), Série Géophysique (N° Hors-Série) de l’Observatoire Royal de Belgique, Bruxelles, 1996.
Warnant, R., Reliability of the TEC computed using GPS measurements: the problem of hardware biases, Acta Geodaetica et Geophysica Hungarica, 32(3–4), 451–459, 1997.
Warnant, R. and J.-C. Jodogne, A Comparison between the TEC Computed using GPS and Ionosonde Measurements, Acta Geodaetica et Geophysica Hungarica, 33(1), 147–153, 1998.
Wilson, B. D. and A. J. Mannucci, Instrumental Biases in Ionospheric Measurements derived from GPS data, Proceedings of ION GPS’93, Salt Lake City, 1993.
About this article
Cite this article
Warnant, R., Pottiaux, E. The increase of the ionospheric activity as measured by GPS. Earth Planet Sp 52, 1055–1060 (2000). https://doi.org/10.1186/BF03352330
- Solar Activity
- Total Electron Content
- Solar Minimum
- Solar Maximum
- Ionospheric Disturbance