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A sporadic F‐layer
It has long been known that the critical frequency of the ionospheric F-layer shows a small but clear maximum at some observatories during the night. This phenomenon is remarkably distinct duringExpand
A Maximum of Temperature in the Middle Ionosphere
J. FUCHS1 has already pointed out the fact that from the change of electron-density (N) with height (h) conclusions as to the temperature in the ionosphere can be drawn. It was, however, not possibleExpand
A newF-layer model
SummaryThe model originally constructed for theF1-layer is adapted to enable an investigation of both theF-layers. Essential premises are: The ionization of a single constituent of atmosphere byExpand
SOME REMARKS ON PAPERS CONCERNING THE GEOMAGNETIC ANOMALY OF THE F2 LAYER.
Abstract Notes that the author drew attention to the geomagnetic anomaly as early as 1942 and lists papers which describe this, and allied, phenomena.
Unsolved problems of the upper atmosphere
Studies on the solar wind approaching the magnetopause
The approach of the solar wind plasma to the magnetopause is analyzed considering the particle motion only in the equatorial plane. The assumed radial-symmetric structure of the earth'sExpand
Interpretation of eclipse effects in theF-layer
SummaryUsing a fit-extended balance equation for the electron-density-variations during a sun eclipse a possiblity has been found to confirm by observation theF-layer processes deduced hithertoExpand
Tuberculosis and the War.
Semi-diurnal lunar tides in the ionosphere over Puerto Rico
Abstract The N(h) profiles of the station Puerto Rico, observed in 1960, have been used to determine the lunar semi-diurnal tide in the electron density N for the heights between 150 and 300 km. ThisExpand
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