Open Access
Table 3
Uniformity of average time-of-day/time-of-year response, Sav(UT, F), of the various mid-latitude geomagnetic range indices.
| Index | Rank | Start date | Method | F bin size | Vav | Largest positive % deviation of Sav(F, UT) from the mean | Largest negative % deviation of Sav(F, UT) from the mean |
|---|---|---|---|---|---|---|---|
| am | 1 | 1959 | Model | 1 day | 0.65 | 1.4 | −1.2 |
| apC | 2 | 1932 | Data | 0.05 year | 1.78 | 5.0 | −4.6 |
| aaH | 3 | 1868 | Data | 0.05 year | 5.54 | 12.6 | −12.3 |
| aa | 4 | 1868 | Data | 0.05 year | 10.62 | 40.8 | −17.0 |
| aa | – | 1868 | Model | 1 day | 8.95 | 29.0 | −16.8 |
| ap | 5 | 1932 | Data | 0.05 year | 11.20 | 25.4 | −21.6 |
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