Table 1
S-index during cycle minimum.
| End cycle 21 | End cycle 22 | End cycle 23 | |||||
|---|---|---|---|---|---|---|---|
| Sample | Timescale | S (nb) | t | S (nb) | t | S (nb) | t |
| Sac. Peak | 1 yr | 0.1693 ± 0.0001 (148) | 1985.91 | 0.1680 ± 0.0002 (131) | 1996.48 | 0.1679 ± 0.0001 (86) | 2007.65 |
| Sac. Peak | 3 months | 0.1686 ± 0.0003 (31) | 1985.50 | 0.1675 ± 0.0003 (31) | 1996.74 | 0.1661 ± 0.0010 (2) | 2008.63 |
| Sac. Peak | 28 d | 0.1679 ± 0.0003 (10) | 1985.49 | 0.1663 ± 0.0005 (11) | 1996.80 | 0.1654 ± –(1) | 2008.58 |
| Kitt Peak | 1 yr | 0.1687 ± 0.0002 (28) | 1986.68 | 0.1672 ± 0.0002 (35) | 1996.12 | 0.1671 ± 0.0001 (30) | 2009.71 |
| Kitt Peak | 3 months | 0.1680 ± 0.0004 (5) | 1986.66 | 0.1662 ± 0.0004 (10) | 1996.28 | 0.1662 ± 0.0005 (6) | 2008.50 |
| Kitt Peak | 28 d | 0.1671 ± –(1) | 1985.42 | 0.1657 ± 0.0004 (7) | 1996.28 | 0.1647 ± –(1) | 2008.57 |
Notes. The S-index is shown for each minimum computed at three different timescales from running means. The uncertainties are derived from the dispersion of the values (not computed if only one point in the bin). The number of observing days in the bin is shown between parenthesis. The time t (in years) corresponds to the average over the observing days in the bin identified as the minimum.
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