Abstract
The influence of the ionosphere on the radio waves emitted by an artificial satellite will be more pronounced the lower the frequency of the waves, and for this reason the emissions from the U. S. S. R. satellites on 40 and 20 Mc/s should be very suitable for investigations of the ionosphere. Information about the structure of the ionosphere may be deduced from three types of observation: (1) the Doppler shift, (2) the Faraday effect, (3) the refraction of the waves. At first sight these seem to provide independent ways of studying the ionosphere but more detailed consideration shows that for satellite observations they are very closely related.
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5 articles.
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