Further study of fOF2 and M(3000)F2 in different solar cycles

P. A. Bradley


Measured monthly median fOF2 and M(3000)F2 for Slough over six solar cycles from 1932 onwards are examined for a selection of hours and months. Data are shown as a function of twelve-monthly smoothed sunspot number. Comparisons are made for the different solar cycles and for the rising and falling halves of each cycle. Measurements for individual cycles are compared with best-fit parabolic regression lines over all cycles to investigate possible systematic long-term effects.


Ionosphere;solar-cycle dependence;long-term mapping

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DOI: https://doi.org/10.4401/ag-4227
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X