Features of wave packet generatin by solar terminator according to GPS data from different latitude regions for 2008

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   Application of the earlier measurements of total electron content (TEC)
   variations allowed us to discover, that solar terminator (ST) passage
   generates middle scale wave packets. It was shown that wave packet
   registration time is different within a year and in a number of cases it
   may be observed before a ST. Registration beginning time agrees well with
   the moment of passage of a terminator at a magnetically conjugated region.
   The paper presents the results of observations of wave packets in TEC
   according to the data from different latitudinal regions in 2008.
   Peculiarities of wave packet parameter variations are shown in dependence
   on their geomagnetic latitude. For the middle latitude region, coincidence
   of registration of wave packet beginning with the moment of ST passage in
   the magnetically conjugated region is generally characteristic. In the
   Northern Hemisphere, registration of wave packets advances the appearance
   of evening ST in summer, when its inclination relatively the equator is
   maximal. The value of this advance grows with latitude but still coincides
   with the moment of ST passage in the magnetically conjugated region.
   Evening and morning ST effects appear the strongest at different time. In
   summer at middle latitudes, the evening terminator effect is the most
   vivid; in winter it is the morning one. On wave packet number
   distributions in the system of ST local time, the transition from winter
   conditions to summer ones is clearly defined. The results, obtained from
   the data of Brazil station network did not show a marked coincidence of
   the beginning of wave packet generation in this region with ST passage in
   a magnetically conjugated point. Evidently, it may be explained by
   allocation of the majority of these stations in the equatorial anomaly
   region. The work was supported by Russian Foundation for Basic Research
   (grants No. 12-05-33032-a and 12-05-31069-a) and by the Ministry of
   Education and Science of the Russian Federation (agreement No. 8699).