TEMPORAL VARIATIONS OF IONOSPHERIC SCINTILLATION INDEX ON COSMIC RADIOSOURCES OBSERVATIONS AT DECAMETRIC WAVE RANGE

Abstract

The measurements of cosmic radiosources have scintillations on ionospheric irregularities at decametric waves. The analysis of temporal variations of the scintillation indexes was carried out on the base of observation data obtained on RT URAN-4 during 1998-2001. Daily-seasonal dependence of these indexes was investigated. The values of scintillation indexes varied within intervals from several minutes to several years, the amplitudes of such variations can reach 70 per cent from mean value.