Studies on Ionospheric Scintillations Recorded at Nagpur

Abstract

Ionospheric scintillations of 136 MHz plane polarized signals from the geostationary satellite ETS-II were observed at Nagpur, a low latitude station, during the period 1980-81. The onset time of scintillation was found to be predominantly around 1930 hrs LT. This has been explained in terms of sunset at the mean field height of the ionosphere. The diurnal and seasonal variation of scintillation activity has been analyzed. The preliminary results show that there is an apparent correlation between scintillation activity and the total electron content (TEC) of the ionosphere. The correlation with solar activity was found to be positive and significant in summer but not as significant in winter. The correlation with magnetic activity was observed to be negative during summer and positive in winter.