Physics
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54...75l&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, Jan. 1992, p. 75-85. Research supported by DFG.
Physics
20
Doppler Effect, Ionospheric Electron Density, Plasma Frequencies, Plasma Oscillations, Ionospheric Heating, Plasma Turbulence, Polar Regions, Spectrum Analysis
Scientific paper
Results are presented of ionospheric modification experiments carried out at Tromso, Norway, in October and November 1988. These experiments were jointly conducted by IZMIRAN and MPAe. In these experiments, small scale electron density perturbations (having a vertical size about 1 km and a density variation about 0.1 percent) were found to be excited near the reflection and upper hybrid resonance (UHR) points of an O-mode pump wave. When the pump frequency was close to the triple electron gyrofrequency, there were no noticeable perturbations near the UHR point. This peculiarity correlated well with a decrease of the intensity of simulated electromagnetic emission (SEE). When SEE is comparatively weak, the SEE intensity can vary quasi-periodically, with a quasi-period of approximately 1 s. When this happens, anticorrelations between different parts of the SEE spectrum become possible.
Gruzdev Iu. V.
Kim Iu. V.
Kopka Helmut
Lobachevskii L. A.
Mikhailova G. A.
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