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GPS is a commanding tool to probe ionospheric variability. Regardless of our improved knowledge of the ionosphere dynamics, the day-to-day variability still lies within the framework of statistical estimations and the underlying physical mechanisms are far from being fully understood. Significant deviations from monthly median values are observed from time to time in ionospheric records during completely quiet solar and geophysical conditions and are not fully understood. TEC obtained from GPS signals are used to study ionospheric dynamics over Bhopal during low solar activity period March 2004 –February 2005. The TEC time series for the five quietest and five most disturbed days of each month of the year were selected for the study. The objective of the study is to have better understanding of the causes observed during day-to-day variability of ionospheric parameters so that it can be effectively used for modeling and prediction purpose.

Variation of variability in tec for quiet and disturbed days at low latitude station bhopal using gps