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The role of post-sunset vertical drifts at the equator in predicting the onset of VHF scintillations during high and low sunspot activity years
The day-to-day variability in the occurrence of ionospheric scintillations, which are of serious concern in the trans-ionospheric communications, makes their prediction still a challenging problem. This paper reports on a systematic study in quantitatively identifying the precursors responsible, such as pre-reversal E×B drift velocity, geomagnetic activity index (K p ) and the Equatorial Ionization Anomaly (EIA) gradient, for the onset of VHF scintillations over a low-latitude station, Waltairdoi:10.5194/angeo-24-1609-2006 fatcat:5prj7wvg3zh4pgddchksdp3mri