Modification of the Ionosphere by Radiowaves.

Robert LeLevier

Expert InsightsPublished 1969

A theoretical model is presented for calculating the heating and hydrodynamic expansion of the F-layer of the ionosphere due to an incident radiowave. We find that the greatest effects occur for transmitter frequencies just above the critical frequency of the F-layer. Using a power aperture product of 10 exp (4) megawatt-sq. meter, which corresponds to a projected experiment by ESSA at Boulder, Colorado, we find a maximum increase in the electron temperature at the peak of the F-layer of about 30 percent with a reduction in the electron density of about 10 percent. The time scale for achieving the density changes is predicted to be about one-half hour to an hour. (Prepared for the Journal of Geophysical Research.) 27 pp. Ref. (Author)

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LeLevier, Robert, Modification of the Ionosphere by Radiowaves. Santa Monica, CA: RAND Corporation, 1969. https://www.rand.org/pubs/papers/P4125.html.
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