Total electron content structure in the Middle East


  • Haim Soicher,

  • Zvi Houminer,

  • Avraham Shuval


Polarization rotation data recorded from the geostationary satellite SIRIO at Haifa, Israel, have been used to study the structure and variability of the total electron content (TEC) during the maximum phase of the current solar cycle. In addition to the overall diurnal and seasonal variation, the TEC is regularly modulated by the effects of traveling ionospheric disturbances (TID's). The behavior of TID's in terms of their frequency of occurrence, amplitude, period, and time of occurrence is seasonally dependent. Comparison with average behavior of TEC and related parameters observed during the minimum phase indicates the extent of the solar cycle variation.