Structure in the seasonal variations of ionospheric Es occurrence in the South Pacific |
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Affiliation: | 1. Institute for Scientific Research, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA 02467, United States;2. Bozeman High School, 205 North 11th Avenue, Bozeman, MT 59715, United States;3. now at Rice University, 6100 Main St, Houston, TX P77005, United States;1. Department of Physics, University of Lagos, Akoka, Lagos, Nigeria;2. B. K. M. Science College, Valsad, Gujarat, India |
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Abstract: | A survey is presented of the occurrence of strong ionospheric sporadic-E for South Pacific ionosonde stations covering a period of many years. The seasonal characteristics indicate the presence of strong non-solar effects with, for example, subtropical data showing strong afternoon enhancements of Es activity in the autumn. |
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