Very low frequency emissions from the exosphere

TL;DRAbstract

This work describes investigations in a relatively new field: very, low frequency radio emissions from the earth's atmosphere. It is new in that most of the development has occurred in the last five or six years, though the phenomena has been known for some decades. Two basic types of emissions occur: continuous (hiss\) and discrete. When this work was begun in 1959 comparatively little was known about \"hiss‚ÄövÑvp though a considerable amount of information about the discrete emissions was obtained during the I.G.Y. The cause of either of these types was still a mystery though two theories (shown to be unlikely in this thesis) which seemed to explain some of the features of the discrete emissions appeared in that year. The dominant feature of this thesis is the doppler shifted (electron) cyclotron theory which is shown to explain all types of V.L.F. exospheric emissions. This idea occurred to the author while writing Chapter 4 (review of theories) after all the experimental work and

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