Table 2 Magnetic sources considered in the model (first column) together with the coordinate systems they are expressed in (second column)
From: Kalmag: a high spatio-temporal model of the geomagnetic field
Source | Coordinate | \(\ell _{max}\) | \(m_{\tiny {max}}\) |
|---|---|---|---|
Core \(g_{c}\) | GEO | 20 | \(\ell _{max}\) |
Lithospheric \(g_{l}\) | GEO | \(100^{\mathrm{a}}\), \(150^{\mathrm{b}}\), \(1000^{\mathrm{c}}\) | \(\ell _{max}\) |
Remote magnetospheric \(g_{rm}\) | GSM | 1 | 0 |
Close magnetospheric \(g_{m}\) | SM | 15 | 1 |
Fluctuating magnetospheric \(g_{fm}\) | SM | 15 | 0 |
Residual ionospheric/ induced \(g_{ii}\) | MAG | 50 | 1 |
Field-aligned currents \(g_{fac}\) | SM | 15 | 1 |