Journal ArticleDOI
Theoretical study of gyroresonances with application to rocket experiments
J. Bitoun,L. Fleury,B. Higel +2 more
TLDR
In this article, the waveforms and envelopes of resonance signals observed in the ionosphere at 2, 3, 4, and 5fH by rocket experiment are compared with the analytical results provided by a spatial ray-tracing procedure which takes the gradient of Earth's magnetic field into account.Abstract:
The waveforms and envelopes of resonance signals observed in the ionosphere at 2, 3, 4, and 5fH by rocket experiment are compared with the analytical results provided by a spatial ray-tracing procedure which takes the gradient of Earth's magnetic field into account. An approximate calculation yields the algebraic expression of the wave damping from whence the decrease of the received signals is deduced versus time as well as their frequency variations.read more
Citations
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Journal ArticleDOI
Whisper, a resonance sounder and wave analyser: Performances and perspectives for the Cluster mission
Pierrette Décréau,P. Fergeau,V. Krannosels'kikh,M. Lévêque,Ph. Martin,Orélien Randriamboarison,F. X. Sené,Jean-Gabriel Trotignon,P. Canu,P. B. Mögensen +9 more
TL;DR: The WHISPER sounder on the Cluster spacecraft is primarily designed to provide an absolute measurement of the total plasma density within the range 0.2-80 cm-3 as discussed by the authors. But this is achieved by means of a resonance sounding technique which has already proved successful in the regions to be explored.
Journal ArticleDOI
Electron density and plasmapause characteristics at 6.6 RE : A statistical study of the GEOS 2 relaxation sounder data
Bernard Higel,Wu Lei +1 more
TL;DR: On board the geostationary GEOS 2, a relaxation sounding (RS) experiment using a pulsed active wave technique has been operated in the frequency range 03-77 kHz as discussed by the authors.
Book ChapterDOI
Plasma Density Measurements from the GEOS-1 Relaxation Sounder
J. Etcheto,J. J. Bloch +1 more
TL;DR: The relaxation sounder as mentioned in this paper uses the characteristics of the propagation of radiowaves to sound the plasma surrounding the spacecraft and determines, in particular, the plasma frequency, which gives the electron density.
Journal ArticleDOI
Measurements of electric and magnetic wave fields and of cold plasma parameters on-board GEOS-1. Preliminary results
TL;DR: In this paper, the authors describe the principle of this complex experiment which measures the cold plasma parameters (density and temperature) via active sounding, the d.c. electric field, and the electromagnetic and electrostatic waves in the frequency range ∼1 × 10 −2 −8 sx 10 4 Hz.
Journal ArticleDOI
The ISEE Electron Density Experiment
TL;DR: The French electron density experiment aboard the ISEE 1 and 2 satellites really consists of two separate, but complementary, experiments to measure the total electron density by means of radio techniques as discussed by the authors.
References
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Journal ArticleDOI
Handbook of Mathematical Functions with Formulas, Graphs and Mathematical Tables
Journal ArticleDOI
Waves in a Plasma in a Magnetic Field
TL;DR: In this article, the Laplace transform method was used to study the small oscillations of a fully ionized plasma, in which collisions are negligible, in a constant external magnetic field, and the full set of Maxwell equations was employed and the ion dynamics were included.
Journal ArticleDOI
Eikonal Method in Magnetohydrodynamics
TL;DR: In this paper, the eikonal method is extended to wave propagation in inhomogeneous anisotropic media, and the change in amplitude along a ray path is derived for the motion of wave packets and the corrections due to diffraction.
Journal ArticleDOI
Resonance effects of electrostatic oscillations in the ionosphere
J. A. Fejer,W. Calvert +1 more
TL;DR: Plasma resonance effects due to electrostatic oscillations of ionospheric electrons including dispersion and relaxation properties were studied in this article, where the authors proposed a method to estimate the magnetic field of the ionosphere.
Journal ArticleDOI
Ray trajectories in an anisotropic plasma near plasma resonance
TL;DR: In this paper, the case of an electron concentration gradient orthogonal to the magnetic field, traveling only a short distance but experiencing a large delay, is considered, which may account in part for the resonances observed by ionospheric topside sounders.