Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1777980 | Journal of Atmospheric and Solar-Terrestrial Physics | 2009 | 6 Pages |
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 (4Â kR) radiowave-induced 557.7-nm aurora event.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
L.M. Kagan, J.W. MacDougall, M.C. Kelley,