Table 6.
Definition of colour codes of solar cycle phases (see Fig. 5).
| Colour | From | To | α factors used |
|---|---|---|---|
| Red | Launch NOAA-16 (2001) | Launch NOAA-18 + 6 months (2005)a | α 1 N16 |
| Green | Launch NOAA-17 (2002) | Launch MetOp-02 + 6 months (2007) | α 1 N17 |
| Yellow | Launch NOAA-18 (2005) | Launch NOAA-19 + 6 months (2009) | α 1 N18, |
| Turquoise | Launch MetOp-02 (2007) | Launch MetOp-01 + 6 months (2013) | α 1 M02, α 2 N17 |
6 months is added to the date of launch of the satellite defining the end of a period. This is because Sandanger et al. (2015) used one year of data from the new satellites to calibrate the old satellites and placed the calibration α factor in the middle of the respective 1-year period.
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