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Table 1
Vertical sounding stations and data sets used in the paper.
| Ionosonde station | URSI ID | Geographic latitude [°N] | Geographic longitude [°E] | foF2 /NmF2 data years |
|---|---|---|---|---|
| Slough | SL051 | 51.5 | 359.4 | 1952 – 1993 |
| Chilton | RL052 | 51.1 | 359.4 | 1994 – 2021 |
| Juliusruh | JR055 | 54.6 | 13.4 | 1958 – 2023 |
| Kokubunji | TO536 | 35.7 | 139.5 | 1958 – 2022 |
| Wakkanai | WK545 | 45.0 | 141.0 | 1952 – 1987 |
| 2001 – 2022 | ||||
| Canberra | CB53N | −35.3 | 149.0 | 1952 – 2023 |
| Brisbane | BR52P | −27.5 | 152.9 | 1953 – 1986 |
| Hobart | HO54K | −43.0 | 147.3 | 1952 – 20231 |
| Boulder | BC840 | 41.6 | 254.7 | 1958 – 20222 |
| Port Stanley | PS5J5 | −51.6 | 302.1 | 1957 – 1990 |
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