Physics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9512187j&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Aug. 1, 1990, p. 12187-12195. Research supported by DFG.
Physics
17
Extremely Low Radio Frequencies, Ionospheric Heating, Ionospheric Propagation, Very Low Frequencies, Antenna Radiation Patterns, Auroral Electrojets, Signal Distortion, Signal Transmission
Scientific paper
DE 1 satellite radio observations were conducted in the 1525-5925 Hz range during a pass over an ionospheric heating facility; the waves were detected during a 2-min period, and the measurements indicated pulse-stretching by a few hundred msec, in conjunction with spectral broadening of about 10 Hz. The observed signal delays and pulse distortion are not consistent with expectations assuming propagation in a smooth magnetosphere between the assumed 'polar electrojet antenna' in the ionospheric D/E region and the 11,000-km altitude of the satellite. Scattering by density irregularities is judged the likely sources of the spectral broadening and delays.
Inan Umran S.
James Gordon H.
Rietveld Michael T.
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