Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3420806k&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 20, CiteID L20806
Physics
3
Ionosphere: Ionospheric Irregularities, Ionosphere: Equatorial Ionosphere, Ionosphere: Plasma Waves And Instabilities (2772), Radio Science: Ionospheric Physics (1240, 2400), Radio Science: Remote Sensing
Scientific paper
The experiment of Balsley and Farley (1971) in Jicamarca, Peru has been the only multi(3)-frequency investigation of the equatorial electrojet. The radar was operated sequentially at frequencies of 16.25, 49.92 and 146.25 MHz and probed the same ionospheric volume. The most prominent feature of these observations was the increase in the phase velocity V ph of Farley-Buneman (FB) waves with increasing radar frequency while the classical fluid theory gives V ph independent on their wavelength and the simple kinetic theory accounts for only a small increase in V ph . Our recent theory predicts a wavenumber dependence of the FB wave phase velocity. The rate of increase depends on the altitude of the electrojet and seems to match the observed wave behavior. The most important byproduct of this case study is our conclusion that the energy exchange rate in inelastic electron-neutral interactions is about two-to-three times higher that it has been assumed in estimates.
Kagan Ludmila M.
Kissack R. S.
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