Excitation of sidebands due to nonlinear coupling between a VLF transmitter signal and a natural ELF emission

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/91JA00695· OSTI ID:5257121

Sotnikov, V I; Fiala, V; Lefeuvre, F; Lagoutte, D ^[1]; Mogilevsky, M ^[2]

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1. Lab. de Physique et Chimie de l'Environnement, Orleans (France)
2. Space Research Inst., Moscow (USSR)

Symmetric sidebands are observed in the ionosphere by the AUREOL 3 satellite when it passes at a height of 1,200 km above the VLF transmitter at the Komsomolsk-on-Amur Alpha station (50{degree}5 N, 135{degree} E, frequency 11.90 and 12.65 kHz). The sidebands are about 500 Hz off the carrier frequency of Alpha pulses. They are approximately 20 dB lower than the transmitter signal, and they appear only when ELF natural emission above the local proton gyrofrequency is observed. The data are presented and analyzed. The nonlinear coupling of the VLF transmitter signal to natural ELF emission is invoked to explain the symmetric sidebands. It is shown that the nonlinear current excited by the beats of VLF and ELF waves is strong enough to explain the sideband amplitude.

• OSTI ID: 5257121
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 96:A7; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
DATA
DATA ANALYSIS
DIMENSIONS
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTROMAGNETIC RADIATION
HEIGHT
INFORMATION
INSTABILITY
IONOSPHERE
NONLINEAR PROBLEMS
PARAMETRIC INSTABILITIES
PLANETARY IONOSPHERES
PLASMA DENSITY
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
SATELLITES
SCATTERING
SIGNALS
WAVE PROPAGATION