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Table 1
Information of the ionosonde stations and data.
| Station name | Geographic location | Magnetic latitude | Year coverage of data |
|---|---|---|---|
| Dikson | 80.4° E, 73.5° N | 63.2° N | 1957–1959, 1982–1986, 1988–2001 |
| Norilsk | 88.1° E, 69.4° N | 58.7° N | 1968–1988 |
| Yakutsk | 129.6° E, 62.0° N | 51.3° N | 1957–1989, 1991 |
| Petropavlovsk | 158.7° E, 53.0° N | 45.0° N | 1968–1974, 1989–2006 |
| Irkutsk | 104.0° E, 52.5° N | 41.3° N | 1957–1992, 1996–1997 |
| Wakkanai | 141.7° E, 45.4° N | 35.7° N | 1948–1988, 1992–1993, 1996–2018 |
| Kokubunji | 139.5° E, 35.7° N | 25.9° N | 1957–2018 |
| Yamagawa | 130.6° E, 31.2° N | 20.7° N | 1957–1988, 1996–1999, 2001–2018 |
| Okinawa | 127.8° E, 26.3° N | 15.6° N | 1957–1989, 1992–1993, 1996–2018 |
| Manila | 121.1° E, 14.7° N | 3.7° N | 1964–1994, 1999 |
| Kodaikanal | 77.5° E, 10.2° N | 0.6° N | 1957–1987 |
| Singapore | 103.8° E, 1.3° N | 9.8° S | 1957–1971 |
| Darwin | 131.0° E, 12.5° S | 22.9° S | 1982–2009 |
| Townsville | 146.9° E, 19.7° S | 28.4° S | 1951–1994, 1997, 2003–2009 |
| Brisbane | 152.9° E, 27.5° S | 35.3° S | 1950–1986, 2002–2009 |
| Canberra | 149.1° E, 35.3° S | 43.5° S | 1950–1994, 2003–2009 |
| Hobart | 147.3° E, 42.9° S | 51.2° S | 1950–1959, 1962–1994, 1999, 2003–2009 |
| Macquarie Is | 159.0° E, 54.5° S | 60.6° S | 1950–1958, 1983–1992, 2003–2009 |
| Terre Adelie | 140.0° E, 66.7° S | 75.2° S | 1959, 1964–1986 |
| Casey | 110.6° E, 66.3° S | 77.5° S | 1957–1975, 1990–1992, 2004–2009 |
| Scott Base | 166.8° E, 77.9° S | 78.8° S | 1958–1959, 1970–1983, 2003–2006 |
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