Table 1 RMS differences between field survey D (min), H (nT) and Z (nT) main field components and different geomagnetic field models over the southern African region from 2005 till 2014
RMS differences: main field (obs) model | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Year | SAREG model | IGRF-12 | CHAOS-5 | ||||||
D | H | Z | D | H | Z | D | H | Z | |
2005 | 28.0 | 63.9 | 155.6 | 32.5 | 81.4 | 178.6 | 32.6 | 79.6 | 179.2 |
2006 | 27.0 | 63.1 | 153.0 | 32.3 | 75.8 | 172.6 | 31.2 | 74.9 | 173.8 |
2007 | 28.1 | 66.8 | 153.5 | 32.0 | 78.1 | 173.0 | 30.9 | 76.9 | 173.8 |
2008 | 27.2 | 65.4 | 148.1 | 31.4 | 78.0 | 168.9 | 30.7 | 75.9 | 168.3 |
2009 | 27.8 | 62.6 | 123.5 | 31.3 | 79.3 | 160.0 | 31.1 | 76.1 | 158.8 |
2010 | 29.6 | 66.9 | 142.3 | 32.9 | 80.0 | 159.6 | 33.1 | 77.2 | 159.6 |
2011 | 29.3 | 66.1 | 135.5 | 33.6 | 80.6 | 168.9 | 34.1 | 79.6 | 169.0 |
2012 | 23.3 | 62.7 | 128.4 | 27.0 | 71.5 | 158.6 | 27.4 | 70.0 | 159.5 |
2013 | 25.8 | 59.1 | 127.3 | 27.7 | 82.4 | 145.8 | 28.1 | 79.3 | 147.2 |
2014 | 27.5 | 63.1 | 160.1 | 30.6 | 75.1 | 175.1 | 31.1 | 73.0 | 175.5 |