Revisiting sunspot number as an extreme ultraviolet (EUV) proxy for ionospheric F2 critical frequency
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DOI: 10.5194/angeo-43-91-2025
Abstract: Abstract. This study reconsiders sunspot number (Sn) as a solar extreme ultraviolet (EUV) proxy for modeling the ionospheric F2 layer's critical frequency (foF2) over the period 1960–2023. We compare the performance of Sn with F10.7… read more here.
Keywords: critical frequency; euv proxy; extreme ultraviolet; ultraviolet euv ... See more keywords