Three dimensional ray tracing Jovian magnetosphere in the low frequency range

Details Three dimensional ray tracing Jovian magnetosphere in the low frequency range Three dimensional ray tracing Jovian magnetosphere in the low frequency range

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sri..reptq....m&link_type=abstract

Final Report Southwest Research Inst., San Antonio, TX.

Other

Decametric Waves, Io, Jupiter (Planet), Magnetic Signatures, Planetary Magnetospheres, Ray Tracing, Spacecraft Motion, Coding, Computer Programs, Curvature, Low Frequency Bands, Relativistic Electron Beams, Three Dimensional Flow

Scientific paper

Ray tracing of the Jovian magnetosphere in the low frequency range (1+40 MHz) has resulted in a new understanding of the source mechanism for Io dependent decametric radiation (DAM). Our three dimensional ray tracing computer code has provided model DAM arcs at 10 deg. intervals of Io longitude source positions for the full 360 deg of Jovian system III longitude. In addition, particularly interesting arcs were singled out for detailed study and modelling. Dependent decametric radiation arcs are categorized according to curvature--the higher curvature arcs are apparently due to wave stimulation at a nonconstant wave normal angle, psi. The psi(f) relationship has a signature that is common to most of the higher curvature arcs. The low curvature arcs, on the other hand, are adequately modelled with a constant wave normal angle of close to 90 deg. These results imply that for higher curvature arcs observed for from Jupiter (to diminish spacecraft motion effects) the electrons providing the gyroemission are relativistically beamed.

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