Showing papers by "Tobia Carozzi published in 1996"
TL;DR: In this article, the spectral and dynamic characteristics of broad upshifted maximum (BUM) in the spectrum of artificial ionospheric radio emission (AIRE) were studied and it was shown that BUM is already formed starting from pump-wave frequencies that are smaller by at least 10 kHz than the values of electron gyrofrequency harmonic nfHe determined by the disappearance of the principal downshifted maxima in AIRE spectrum.
Abstract: We present measured spectral and dynamic characteristics of the broad upshifted maximum (BUM) in the spectrum of artificial ionospheric radio emission (AIRE). It is shown that BUM is already formed starting from pump-wave frequencies that are smaller by at least 10 kHz than the values of electron gyrofrequency harmonic nfHe determined by the disappearance of the principal downshifted maximum (DM) in AIRE spectrum. The characteristics of additional maxima in BUM spectrum, which are a multiple of its principal maximum, are studied. It is shown that the frequency of BUM intensity maximum does not depend on the pump-wave frequency and the characteristic times of its evolution increase sharply for fPW close to nfHe. We discuss the possibility of existence of the “fast“ and “slow“ components in BUM spectrum, which have significantly different evolution times. Experimental results on BUM behavior for different regimes of ionosphere modification are presented.
23 citations