Article ID Journal Published Year Pages File Type
1777980 Journal of Atmospheric and Solar-Terrestrial Physics 2009 6 Pages PDF
Abstract
We will show that the presence of height-extended ionization in the night-time ionospheric E region during high-power radiowave transmission into the magnetic zenith could allow for strong self-focusing of the transmitter beam due to the resonance instability near the upper-hybrid resonance level (the so-called magnetic zenith effect, never before reported for the E region) and for unusually strong enhancement in effective radiowave power due to the parametric instability, occurring in the Langmuir resonance region. This leads to 36-40 times higher effective radiated power and 36-40 times brighter optical emissions as was observed during the extraordinary bright (4 kR) radiowave-induced 557.7-nm aurora event.
Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Geophysics
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