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Journals and Conferences
Variations observed in the length of the day can be divided into three types: seasonal, irregular, and long-term. The astronomical data examined here for the years 1956-1969 suggest that the seasonal… (More)
SEVERAL authors have demonstrated that, at very high latitudes, the critical frequency and height of the ionospheric F2 layer are strongly dependent on Universal Time. For example, Duncan1 has shown… (More)