Physics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.4451b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, April 1, 1986, p. 4451-4459. Research supported by the Max-Planck-Ins
Physics
15
Auroral Electrojets, Extremely Low Radio Frequencies, Radio Frequency Heating, Very Low Frequencies, Arctic Regions, Atmospheric Models, Daytime, Ionospheric Electron Density, Night Sky, Polarization Characteristics
Scientific paper
The heating facility at Ramfjordmoen near Tromso, Norway, has been used to modulate the auroral electrojet at frequencies in the range 223 Hz to 5.44 kHz. ELF/VLF signals have been received at Lycksele, Sweden, 554 km from the heating transmitter, over the whole frequency range with maximum amplitudes of about 50 fT. Both azimuthal and radial magnetic field components were recorded and the ratio of these two components, commonly termed the polarization, was determined. The experimental results have been successfully modelled by using waveguide mode theory and assuming the heating source to be a point dipole located in the ionosphere at the height of the maximum ELF/VLF Hall current.
Barr Richard
Kopka Helmut
Rietveld Michael T.
Stubbe Peter
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