Abstract
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.
Keywords
Ionosphere;solar-cycle dependence;long-term mapping
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DOI: https://doi.org/10.4401/ag-4227
Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X