The invest igat ions on Ionosphere developed largely because of the ionospheric communicat ions, the improvement of which
depends upon the increased knowledge of the ionospheric behavior and it s characterist ics. The study of radio wave scint illat
ions plays an important role in understanding the basic mechanisms of the generat ions of ionospheric irregularit ies as well as planning of atellite based communicat ion systems and developing satellite based radar systems. In this paper we present the digitally recorded ionospheric scint illat ion data of 150.649MHz signal from FLEETSAT satellite at near equatorial station Anantapur, acquired through a PC based real t ime data acquisit ion system and analyze this data to evaluate the S4 index, the auto correlat ion funct ion and power spectra.

Key words: Ionosphere, Power Spectral, Scint illat ions, Scint illat ion Index.