Electromagnetic resonance phenomena and equipments to study the relation between solar activity and the magnetoplasma (ionosphere)

Agnelli, G.; Cimino, M.; Cutolo, M.; Puglisi, M.

doi:10.1080/00018737000101101

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…The stability of the DF mode over the DM mode and the HF spectra suggest the effects of harmonics, and the possible nonlinear interactions between them. Nonlinear interaction between the carrier and sideband waves can produce a signal due to the detection effect arising from a ponderomotive force, which can occur if V(E 2) does not vanish [Stubbe, 1982b;Agnelli, 1970]. Here, E is the sum of the electric fields of both carrier and sidebands.…”

Section: Signal Stability and Phase Considerationsmentioning

confidence: 99%

Comparison of ELF/VLF generation modes in the ionosphere by the HIPAS heater array

Villaseñor¹,

Wong²,

Song³

et al. 1996

Radio Science

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The characteristics of three different modes of ELF and VLF excitation using the high‐power auroral simulation (HIPAS) HF heater array are compared under different ionospheric conditions. For each of these three methods, amplitude modulation (AM), phase demodulation (DM), and the double‐frequency excitation (DF), we observed signals on the order of a few picoteslas at two widely separated receiver sites for both X and O mode heater polarizations. Strong electrojet activity is essential for ELF generation at frequencies close to the Schumann range, whereas at higher frequencies, such as in the VLF range (greater than 1 kHz), signals could be observed under a wider range of ionosopheric conditions. The AM method generally produced the largest signal at both frequency ranges, while the DM mode was approximately half of this signal amplitude. The DF generated signals are comparable in strength with the AM signals at VLF frequencies and are more stable than either method as a function of time. The X mode polarization also produces a stronger signal than the O mode for these three methods of excitation by a factor of two. The polarization of the received signals follow the same variation at VLF frequencies for all three modes, indicating a common height of origin.

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Section: Signal Stability and Phase Considerationsmentioning

confidence: 99%

Comparison of ELF/VLF generation modes in the ionosphere by the HIPAS heater array

Villaseñor¹,

Wong²,

Song³

et al. 1996

Radio Science

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“…It is well known that the propagation of electromagnetic waves in a rarefied gaseous plasma (as, e.g., radio waves in the ionosphere) may exhibit remarkable nonlinear effects, due to the presence of the nonlinear plasma. The "Luxemburg effect" [Graffi, 1936[Graffi, , 1967, the "Luxemburg effect with resonance" or "gyro-interaction effect" [Cutolo, 1964;Agnelli et al, 1970], the "detection effect" [Lanza 1967], the "parametric coupling (parametrische Wechselwirkung)" of waves [Schanda, 1971;Aslaksen, 1971] have been extensively dealt with in old and recent literature (see also Graffi [1965] and õ39 of Ginzburg [1960]).…”

Section: Introductionmentioning

confidence: 99%

Numerical results for a cross‐modulation problem in a rarefied nonlinear plasma

Bassanini¹

1974

Radio Science

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The problem of cross-modulation of the electromagnetic waves generated by two oscillating electric dipoles placed in the center of a spherical cavity surrounded by a nonlinear plasma is considered. One of the dipoles is amplitude-modulated with low (acoustic) frequency, and the plasma is assumed slightly ionized, rarefied, and cold. Second-harmonic generation is investigated by means of a perturbative technique in the frame of the "quasi-hydrodynamic" approach, assuming a nonzero electron collision frequency. Numerical results for the field modulated upon the sum of the frequencies of the two dipoles are given, in correspondence to values of the parameters of relevance for radio wave propagation in the ionosphere, and a nonlinear effect of resonance is emphasized. PROBLEM 865 campo elettromagnetico, Atti Accad. Naz. Modena, 6, 3-27.

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Sopra un problema di interazione di onde elettromagnetiche in un plasma non lineare a geometria sferica

Bassanini

1974

Journal of Applied Mathematics and Physics (ZAMP)

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Electromagnetic resonance phenomena and equipments to study the relation between solar activity and the magnetoplasma (ionosphere)

Cited by 6 publications

References 33 publications

Comparison of ELF/VLF generation modes in the ionosphere by the HIPAS heater array

Comparison of ELF/VLF generation modes in the ionosphere by the HIPAS heater array

Numerical results for a cross‐modulation problem in a rarefied nonlinear plasma

Sopra un problema di interazione di onde elettromagnetiche in un plasma non lineare a geometria sferica

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