Table 1 The six magnetic sources simulated by the Kalmag model and their used spatial resolution
Internal sources | SH degree | External sources | SH degree |
|---|---|---|---|
Core field | 20 | Close magnetospheric field | 10 |
Lithospheric field | 75 | Remote magnetospheric field | 1 |
Ionospheric field | 5 | Fluctuating magnetospheric field | 1 |