Study of scintillations observed at Delhi during high solar activity period

Abstract

Diurnal and seasonal variations in the occurrence of both daytime and nighttime scintillations observed at Delhi during high solar activity period of 1979-80 are described. The occurrence of daytime scintillations is maximum in summer and minimum in winter months. They peak around midday and show negative correlation with solar activity. The nighttime scintillations are of two types, viz, class I (with fading rate more than 6 per min) and class II (with fading rate less than 6 per min). Class I type scintillations show maximum occurrence in equinox and class II in summer. The nighttime class I type scintillations show positive correlation with solar activity, while class II type show negative correlation.