Table 8 The RMS values of the differences between geomagnetic repeat stations input data (GRS) and the three models, SARM, SACFM-2 and CHAOS-6 for the period 2005–2009
Component | 2005 | 2006 | 2007 | 2008 | 2009 |
|---|---|---|---|---|---|
GRS–SARM | |||||
   \(\Delta X\) (nT) | 156.3 | 166.9 | 172.4 | 174.3 | 167.6 |
   \(\Delta Y\) (nT) | 124.2 | 119.3 | 121.8 | 130.0 | 120.3 |
   \(\Delta Z\) (nT) | 216.3 | 193.5 | 190.4 | 194.0 | 169.1 |
GRS–SACFM-2 | |||||
   \(\Delta X\) (nT) | 10.0 | 9.1 | 6.9 | 10.7 | 7.8 |
   \(\Delta Y\) (nT) | 7.8 | 4.9 | 6.4 | 7.4 | 6.9 |
   \(\Delta Z\) (nT) | 9.2 | 4.8 | 5.4 | 6.9 | 8.1 |
GRS–CHAOS-6 | |||||
   \(\Delta X\) (nT) | 87.6 | 100.1 | 102.6 | 107.1 | 101.5 |
   \(\Delta Y\) (nT) | 124.7 | 121.7 | 117.6 | 128.9 | 119.7 |
   \(\Delta Z\) (nT) | 206.4 | 185.3 | 178.9 | 191.0 | 159.7 |