Features of VLF wave propagation in the earth's magnetosphere

Details Features of VLF wave propagation in the earth's magnetosphere Features of VLF wave propagation in the earth's magnetosphere

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989raf....32.1301m&link_type=abstract

Radiofizika (ISSN 0021-3462), vol. 32, Oct. 1989, p. 1301-1303. In Russian.

Physics

Earth Magnetosphere, Magnetic Dipoles, Very Low Frequencies, Wave Propagation, Caustic Lines, Lines Of Force, Point Sources, Satellite Antennas

Scientific paper

A numerical simulation is used to study the propagation of VLF (9.6 kHz) waves emitted by a point magnetic dipole oriented perpendicular to the magnetic meridian surface and positioned at the peak of the magnetic line. The results show that a focal singularity occurring in a homogeneous medium is transformed in the magnetosphere into a caustic surface extended along the magnetic lines of force. The characteristics of these caustic surfaces are examined and their cross-sectional features are illustrated. The results are of interest in connection with studies of satellite-antenna fields.

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