A CONSIDERATION OF RADIO STAR SCINTILLATIONS AS CAUSED BY INTERSTELLAR PARTICLES ENTERING THE IONOSPHERE: PART I. DAILY AND SEASONAL VARIATIONS OF THE SCINTILLATION OF A RADIO STAR

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Abstract
An analysis is made of measurements of the scintillations of the radio source in Cassiopeia recorded at Ottawa during 1954 at a frequency of 50 megacycles per second. After removal of the effect of the altitude of the source, the data show certain daily maxima occurring at solar times dependent on the date of the year. These maxima are found to comprise five separate groupings, two being present roughly from September 13 to March 30, and the other three for the remainder of the year. The obvious lack of circular symmetry suggests a cause external to the solar system, such as the infall of interstellar particles. The apparent directions of arrival of these particles are derived from the scintillation measurements.

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