During October 2003 major geomagnetic storm, intensity scintillations on radio signals at 150 MHz and 400 MHz transmitted coherently from Tsykada beacon satellites have been observed. Through the analysis of intensity fluctuation spectra, evidence of refractive scattering from large scale ionospheric irregularities in the spatial plasma density distribution is found. The presence of refractive scattering is particularly evident in strong scintillation events, where spectral saturation may well occur.
COBISS.SI-ID: 868603
The experimental estimate of radio waves scintillation, caused by plasma density irregularities in the ionosphere, is usually attempted by means of scintillation indices which are essentially standard deviations of stochasticly fluctuating parts of the received radio wave intensity and phase.
COBISS.SI-ID: 1010683