Table 1.
The data sets used in this study and their main characteristics. The noise level is estimated from a red noise model. The number of gaps refers to the number of missing days in the online data files, not to the number of actual service interruptions, which is smaller. Averages refer to fluxes adjusted at 1 AU.
| Wavelength (cm) | Frequency (GHz) | Origin of observations | Beginning of measurements | Number of gaps since beginning | Average level (sfu) | Noise level (sfu) |
|---|---|---|---|---|---|---|
| 3.2 | 9.4 | Toyokawa/Nobeyama | May 1, 1956 | 195 | 297 | 3.0 (1.0%) |
| 8.0 | 3.75 | Toyokawa/Nobeyama | Nov. 6, 1951 | 203 | 124 | 2.5 (2.0%) |
| 10.7 | 2.8 | Ottawa/Penticton | Feb. 14, 1947 | 311 | 111 | 2.8 (2.5%) |
| 15.0 | 2.0 | Toyokawa/Nobeyama | June 1, 1957 | 231 | 101 | 2.0 (2.0%) |
| 30.0 | 1.0 | Toyokawa/Nobeyama | March 1, 1957 | 163 | 81 | 1.9 (2.4%) |
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