Table 1 Details of the digital ionosonde sites used in the investigation
From: Spread-F occurrences and relationships with foF2 and h′F at low- and mid-latitudes in China
Location | Symbol used | Geog. Lat. (°N) | Geog. Long. (°E) | Geom. Lat. (°N) | Geom. Long. (°E) |
|---|---|---|---|---|---|
Haikou | HK | 20.00 | 110.34 | 10.02 | 182.45 |
Guangzhou | GZ | 23.14 | 113.36 | 19.53 | 185.27 |
Beijing | BJ | 40.11 | 116.28 | 30.22 | 187.51 |
Changchun | CC | 43.84 | 125.28 | 34.26 | 195.21 |