Field source/effect | # Parms | Description | ||
---|---|---|---|---|
Core/lithosphere | 30, 480 | Spatial | Geographic spherical harmonic (SH) \(N_{\text{max}} = 120\) | |
Temporal | Order 4 B-splines SV, 6-month knot spacing from \(1999.0-2019.5\), epoch 2015.0, up to \(N_{\text{max}} = 18\) | |||
\(M_2\) tidal | 2, 736 | Spatial | Geographic SH \(N_{\text{max}} = 36\) | |
Temporal | Period of 12.42060122 h, Greenwich fixed phase, complex coefficients | |||
\(N_2\) tidal | 2, 736 | Spatial | Geographic SH \(N_{\text{max}} = 36\) | |
Temporal | Period of 12.65834751 h, Greenwich fixed phase, complex coefficients | |||
\(O_1\) tidal | 2, 736 | Spatial | Geographic SH \(N_{\text{max}} = 36\) | |
Temporal | Period of 25.81933871 h, Greenwich fixed phase, complex coefficients | |||
Ionosphere/induced | 5, 520 | Spatial | Quasi-dipole (QD) frame, underlying dipole SH \(N_{\text{max}} = 60\), \(M_{\text{max}} = 12\) | |
Temporal | Annual, semi-annual, 24, 12, 8, and 6 h periodicities with \(F_{10.7}\) scaling plus induction via a priori 3D conductivity model (“1D+oceans”) and infinite conductor at depth | |||
Magnetosphere/induced | 685, 110 | Magnetosphere | Spatial: | dipole SH \(N_{\text{max}} = 1\) |
Temporal: | Discretized in 1-h bins | |||
Induced | Spatial: | dipole SH \(N_{\text{max}} = 1\) | ||
Temporal: | Discretized in 1-h bins | |||
OHM biases | 597 | One vector bias for each station in local spherical system | ||
VFM-CRF alignment | 4, 755 | Three XYZ-type Euler angles every 10 days for each Swarm satellite and CHAMP satellite single- and double-headed star trackers | ||
Total | 734, 670 | − |