Table 1 Correlation coefficients between NmF2/EUV/HLα and monthly Ap indices under solar minimum and maximum. The total correlation is estimated on the Ceddok scale.
From: The factors affecting noontime ionospheric NmF2 equinoctial asymmetry over mid-latitude regions
Station | Solar Minimum | Solar Maximum | ||||
|---|---|---|---|---|---|---|
Corr. coeff. | Significance | Correlation | Corr. coeff. | Significance | Correlation | |
Boulder | + 0.631 ± 0.237 | 99.9% | Notice/Moder | -0.217 ± 0.421 | Insign. | Absent |
Rome | + 0.494 ± 0.188 | 99.9% | Moderate | -0.009 ± 0.302 | Insign. | Absent |
Juliusruh | + 0.263 ± 0.278 | Insign. | Absent | -0.336 ± 0.307 | 95% | Weak/Absent |
Wakkanai | + 0.494 ± 0.212 | 99.9% | Moder/Weak | -0.364 ± 0.316 | 96% | Moder/Absent |
P. Stanley | + 0.474 ± 0.234 | 99.9% | Moder/Weak | + 0.053 ± 0.303 | Insign. | Absent |
Hobart | + 0.201 ± 0.297 | Insign. | Absent | + 0.029 ± 0.109 | Insign. | Absent |
