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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 27, issue 4
Ann. Geophys., 27, 1521–1525, 2009
https://doi.org/10.5194/angeo-27-1521-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 27, 1521–1525, 2009
https://doi.org/10.5194/angeo-27-1521-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Apr 2009

02 Apr 2009

The first GPS-TEC imaging of the space structure of MS wave packets excited by the solar terminator

E. L. Afraimovich1, I. K. Edemskiy1, S. V. Voeykov1, Yu. V. Yasyukevich1, and I. V. Zhivetiev2 E. L. Afraimovich et al.
  • 1Institute of Solar-Terrestrial Physics SB RAS, 126a, Lermontov street, Irkutsk, 664033, P.O. Box 291, Russia
  • 2Institute of Cosmophysical Research and Radiowave Propagation, FEB RAS, 7, Mirnaya street, Paratunka, Elizovskiy district, Kamchatka region, 684034, Russia

Abstract. Using TEC measurements from the dense network of GPS sites GEONET, we have obtained the first GPS-TEC image of the space structure of medium-scale traveling wave packets (MS TWP) excited by the morning solar terminator (ST). We found that ST-generated wave packets have duration of about 1–2 h and time shift of about 1.5–6 h after the morning ST appearance at an altitude of 300 km. The TWP wave front extends along the morning ST line with the angular shift of about 20°. The time period and wave-length of ST-generated wave packets are about 10–20 min and 200–300 km, respectively. The velocity of the TWP phase front traveling is of about 300 m/s. The space image of MS TWP manifests itself in pronounced anisotropy and high coherence over a long distance of about 2000 km.

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