Abstract
Recently, two models of ionospheric electron density irregularities have been proposed to interpret the GHz scintillation phenomenon. One is an irregularity slab of thickness about 200 km or so around the F-region peak with electron density fluctuations of the order of 20% about its background value. The other assumes an ensemble of field-aligned irregularities throughout the large part of the magnetosphere as the cause for signal fading. Power spectra of GHz scintillation signals for these two models are investigated in this paper from the viewpoint that comparisons between experimental results and model computations may yield important information about the irregularities.
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