Abstract:It may be appropriate to preface this collection of papers with some remarks on a paper published by Ferraro (1945). I shall try briefly to give the background to this work and at the same time indicate the part it has played in ionospheric research.The ionosphere had been explored and its layered structure established in the early days of development of radio transmission. Appleton named two principal ionized layers in the upper atmosphere, in each of which the electron density reaches a maximum value; the E … Show more
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