Physics – Geophysics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...106..315p&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue A1, p. 315-326
Physics
Geophysics
3
Exploration Geophysics, Ionosphere: Wave Propagation, Magnetospheric Physics: Auroral Phenomena, Magnetospheric Physics: Plasma Waves And Instabilities
Scientific paper
The MEMO experiment is a part of the Interball 2 wave consortium. It is connected to a total of six electric and nine magnetic independent sensors. It provides waveforms associated with the measurement of two to five components in the three frequency bands: ELF (5-1000 Hz), VLF (1-20 kHz), and LF (20-250 kHz). Waveforms of three magnetic components and one electric component recorded during observations of auroral kilometric radiation (AKR) allow a detailed study of the characteristics of these emissions. In particular, the wave normal directions of AKR relative to the Earth's magnetic field are determined using several methods: the classical methods based on the plane wave approximation [Means, 1972] and the wave distribution function method which represents the evaluation of the wave energy density distribution with respect to the angular frequency and the wave normal direction(s). One event is fully analyzed in this paper. It is shown that AKR propagates with a polarization quasi-circular (ellipticity value ~0.9), a right polarization (i.e., R-X mode), and wave normals weakly oblique (~30°).
Lefeuvre François
Mogilevski M. M.
Parrot Michel
Rauch Jean-Louis
Santolı̀k O.
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