Physics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..511d&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 14, May 1987, p. 511-514. Research supported by the Institut National des Sc
Physics
36
Auroral Zones, Kilometric Waves, Plasmasphere, Night Sky, Plasma Density, Polarization (Waves), Propagation Modes, Satellite Observation, Thermal Plasmas
Scientific paper
For two Viking orbits crossing the night oval source region of Auroral Kilometric Radiation (AKR), the AKR polarization is derived from the cutoff-frequencies and from the spin modulated pattern of the emission. The R-X mode is predominant, but can be accompanied by the L-O mode and Z mode band. The Z mode is observed continuously from inside the plasmasphere to the AKR source region during one of the orbits shows that steep gradients of the plasma density at the edge of the source region can play an important role for the orientation of the wave polarization plane or for the mode conversion.
Bahnsen Axel
de Feraudy Herve
Jespersen Mogens
Pedersen Bent M.
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