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Plot of F10.7 versus SN, equivalent to Figure 22 but using the new re-calibrated version of the SN series (version 2). The data are smoothed by a 13-month running mean. The data curve is in blue or red for dates before and after 1981. The black lines correspond to linear fits to the entire series (solid line), the period before 1980 (dotted) and the period after 1980 (dashed).
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