Physics
Scientific paper
Jul 1938
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1938natur.142...71a&link_type=abstract
Nature, Volume 142, Issue 3584, pp. 71 (1938).
Physics
2
Scientific paper
THE exploration of the physical state of the upper atmosphere by radio waves has, so far, been principally concerned with the investigation of the distribution of ionization and with the regularities and irregularities in this distribution due to solar control. In a series of measurements made during the past year, we have endeavoured to extend the employment of radio waves to the investigation of upper-atmospheric oscillations. Such oscillations would include tides produced by the gravitational influence of the sun and the moon, and would result in both vertical movements of individual air particles and also in variations of the atmospheric pressure at a given level. The influence of the moon has been examined first, since, the effect being purely gravitational, there is no need to unravel, as in the solar case, the simultaneous effects of tidal motion and varying height of ion-production. Further, for various theoretical and experimental reasons, attention has been confined to the level of Region E of the ionosphere.
Appleton Edward V.
Weekes K.
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