Open Access
Table 5
Periods of various levels of solar activity used for comparison to NOAA F10.7 forecast.
| Solar activity | High | Decreasing | Low | Increasing |
|---|---|---|---|---|
| Begin date | 30 Sept 2001 | 31 Aug 2003 | 17 Jan 2008 | 01 May 2011 |
| End date | 30 Sept 2002 | 30 Aug 2004 | 16 Jan 2009 | 30 Apr 2012 |
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