抄録
This paper reports studies of VHF radio wave scintillations during the nighttime in the Indian zone and compares the results with the corresponding data from the American sector. The seasonal variation of scintillations in the Indian sector showed maxima during equinoxes, compared to a single maxima during the December solistices in the American sector. Indian stations showed a very large decrease in scintillation activity with decreasing solar activity, compared to a very low dependence of scintillations on solar activity in the American sector. The geomagnetic disturbances tend to reduce the occurrence of scintillations more significantly in the Indian than American sector.
