STUDY OF FIELD-ALIGNED IRREGULARITIES BY VLF WHISTLERS AND VHF SCINTILLATIONS

Whistler wave ducting and VHF wave scintillations are known to be due to the plasma irregularities in the ambient medium. The whistler waves from natural origin and amplitude scintillations of FLEETSAT geostationary satellite signals are simultaneously recorded at Varanasi, to study the morphology of irregularities present in the ionosphere. In this paper are presented the preliminary results of these investigations. It has been found that there is no positive correlation between whistler occurrence and VHF scintillations.