Is the F10.7cm – Sunspot Number relation linear and stable? | Journal of Space Weather and Space Climate

Topical Issue - Space climate: The past and future of solar activity

Open Access

Fig. 4

Mean non-parametric profile (red line) with 3-σ_m range (gray shading), obtained by averaging all daily F_10.7 values for S_N within a narrow band centered on the S_N in the bottom axis (see details in the main text). Gray dots are the daily observed values. The number of data points strongly decreases above S_N = 300 and F_10.7 = 250 sfu, leading to a much larger SEM σ_m.

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