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Table 2.
Measured solar radii at several frequencies in the range 18 − 26 GHz with the Grueff Radio Telescope and SRT radio telescopes, obtained through the modelling described in Sects. 3.1 and 3.2.
| Frequency | Telescope | Type radius | HP method | IP method | ECB model | 2GECB model |
|---|---|---|---|---|---|---|
| (GHz) | (arcsec) | (arcsec) | (arcsec) | (arcsec) | ||
| 18.1 | Grueff | Rc |
 |
 |
– | – |
| 18.1 | Grueff | Req |
 |
 |
– | – |
| 18.1 | Grueff | Rpol |
 |
 |
– | – |
| 18.3 | Grueff | Rc |
 |
 |
– | – |
| 18.3 | Grueff | Req |
 |
 |
 |
 |
| 18.3 | Grueff | Rpol |
 |
 |
 |
 |
| 18.3 | Grueff | Rc (averaged) | 981.7 ± 0.3 | 976.4 ± 0.3 | – | – |
| 18.3 | Grueff | Req (averaged) | 984.9 ± 0.6 | 977.8 ± 0.8 | – | – |
| 18.3 | Grueff | Rpol (averaged) | 978.8 ± 0.6 | 974.0 ± 0.8 | – | – |
| 18.8 | SRT | Rc |
 |
 |
– | – |
| 18.8 | SRT | Req |
 |
 |
 |
 |
| 18.8 | SRT | Rpol |
 |
 |
 |
 |
| 23.6 | Grueff | Rc |
 |
 |
– | – |
| 23.6 | Grueff | Req |
 |
 |
– | – |
| 23.6 | Grueff | Rpol |
 |
 |
– | – |
| 24.7 | SRT | Rc |
 |
 |
– | – |
| 24.7 | SRT | Req |
 |
 |
 |
 |
| 24.7 | SRT | Rpol |
 |
 |
 |
 |
| 25.8 | Grueff | Rc |
 |
 |
– | – |
| 25.8 | Grueff | Req |
 |
 |
 |
 |
| 25.8 | Grueff | Rpol |
 |
 |
 |
 |
| 25.8 | Grueff | Rc (averaged) | 979.3 ± 0.4 | 972.1 ± 0.4 | – | – |
| 25.8 | Grueff | Req (averaged) | 979.9 ± 0.9 | 971.9 ± 0.9 | – | – |
| 25.8 | Grueff | Rpol (averaged) | 977.9 ± 0.9 | 973.1 ± 0.9 | – | – |
| 26.1 | Grueff | Rc |
 |
 |
– | – |
| 26.1 | Grueff | Req |
 |
 |
– | – |
| 26.1 | Grueff | Rpol |
 |
 |
– | – |
Notes. As specified at 18.3 and 25.8 GHz, we also report the measured values obtained from the averaged solar maps.
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