Open Access
Research Article

Table 1

Correlation coefficients between monthly median foF2 and foF1 and some indices of solar activity. The best results are given in bold.

Parameter Fmon F3mon F12mon F11mon_w R12
foF2 0.926 0.949 0.944 0.950 0.940
foF1 0.976 0.981 0.975 0.979 0.977

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.