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Table 5.
Values of the correlation coefficient ρ between the solar radius (calculated with the Grueff Radio Telescope through the IP method) and the solar activity at radio frequencies characterised by a good temporal coverage.
| Frequency | Type correlation | Modelling | Statistical | Statistical | Average ρ |
|---|---|---|---|---|---|
| (GHz) | (circle) | (elliptical) | |||
| 18.3 | Rc–sunspot | 0.649 | 0.650 | 0.457 | 0.585 |
| 18.3 | Req–sunspot | 0.786 | 0.584 | 0.622 | 0.664 |
| 18.3 | Rpol–sunspot | 0.444 | 0.576 | 0.263 | 0.428 |
| 18.3 | Req–Rpol | 0.591 | 0.912 | 0.599 | 0.701 |
| 25.8 | Rc–sunspot | 0.299 | 0.299 | −0.273 | 0.108 |
| 25.8 | Req–sunspot | 0.121 | 0.599 | −0.209 | 0.170 |
| 25.8 | Rpol–sunspot | –0.596 | 0.161 | –0.452 | −0.296 |
| 25.8 | Req–Rpol | 0.257 | 0.682 | 0.588 | 0.509 |
Notes. See the caption of Table 4 for a full description of the table.
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