Table 2. Gauss coefficients 
(in nT) and their first time derivative 
(in nT/yr) at epoch 2010.0 for CHAOS-3α, CHAOS-3 and IGRF-11.
(in nT) and their first time derivative 
(in nT/yr) at epoch 2010.0 for CHAOS-3α, CHAOS-3 and IGRF-11.From: The CHAOS-3 geomagnetic field model and candidates for the 11th generation IGRF
CHAOS-3α | CHAOS-3 | IGRF-11 | CHAOS-3α | CHAOS-3 | IGRF-11 | ||
|---|---|---|---|---|---|---|---|
| −29493.75 | −29496.48 | −29496.5 |
| 15.34 | 9.43 | 11.4 |
| −1586.32 | −1586.59 | −1585.9 |
| 16.10 | 15.54 | 16.7 |
| 4943.70 | 4944.29 | 4945.1 |
| −33.79 | −32.54 | −28.8 |
| −2394.86 | −2396.69 | −2396.6 |
| −8.94 | −12.20 | −11.3 |
