From: Statistical evaluation of global geomagnetic field models over Southern Africa during 2015
Model/component | IGRF-12 | CHAOS-6 | POMME-10 |
---|---|---|---|
(a) Main field | |||
D | |||
RMS (min) | 33.2 | 32.9 | 33.2 |
Mean (min) | 9.2 | 9.1 | 9.5 |
σ (min) | 32.3 | 32.1 | 32.2 |
Skewness | −0.28 | −0.3 | −0.29 |
Student’s t | 0.077 | 0.08 | 0.069 |
F-test | 0.93 | 0.95 | 0.94 |
H | |||
RMS (nT) | 73.2 | 73.2 | 73.6 |
Mean (nT) | −16.6 | −13.3 | −14.5 |
σ (nT) | 72.2 | 72.9 | 72.8 |
Skewness | −0.25 | −0.23 | −0.23 |
Student’s t | 0.15 | 0.25 | 0.21 |
F-test | 0.99 | 0.99 | 0.99 |
Z | |||
RMS (nT) | 178.9 | 178.5 | 178.6 |
Mean (nT) | −26.7 | −17.9 | −25.5 |
σ (nT) | 179.2 | 179.8 | 178.9 |
Skewness | 0.3 | 0.3 | 0.35 |
Student’s t | 0.35 | 0.53 | 0.37 |
F-test | 0.88 | 0.87 | 0.88 |
F | |||
RMS (nT) | 157.1 | 157.3 | 156.9 |
Mean (nT) | −17.3 | −10.8 | −17.1 |
σ (nT) | 158.2 | 159.0 | 158.1 |
Skewness | −0.64 | −0.63 | −0.70 |
Student’s t | 0.50 | 0.67 | 0.51 |
F-test | 0.96 | 0.95 | 0.96 |
(b) Secular variation | |||
D | |||
RMS (min/year) | 1.6 | 1.17 | 1.35 |
Mean (min/year) | 1.13 | 0.46 | 0.82 |
σ (min/year) | 1.15 | 1.09 | 1.08 |
Skewness | −1.56 | −2.44 | −2.02 |
Student’s t | 2.5E−07 | 1.1E−02 | 2.2E−05 |
F-test | 0.61 | 0.84 | 0.95 |
H | |||
RMS (nT/year) | 6.3 | 5.5 | 8.8 |
Mean (nT/year) | 2.0 | 1.78 | 7.08 |
σ (nT/year) | 6.1 | 5.27 | 5.32 |
Skewness | −0.17 | −0.64 | −0.7 |
Student’s t | 4.3E−02 | 3.9E−02 | 2.6E−10 |
F-test | 0.44 | 0.84 | 0.94 |
Z | |||
RMS (nT/year) | 6.6 | 3.6 | 6.9 |
Mean (nT/year) | −4.7 | −0.95 | 6.32 |
σ (nT/year) | 4.7 | 3.53 | 2.92 |
Skewness | 0.16 | 0.14 | 0.15 |
Student’s t | 1.9E−07 | 9.6E−02 | 1.7E−16 |
F-test | 0.10 | 0.69 | 0.98 |
F | |||
RMS (nT/year) | 11.7 | 11.8 | 9.2 |
Mean (nT/year) | 5.5 | −3.3 | −1.9 |
σ (nT/year) | 10.4 | 11.8 | 9.1 |
Skewness | −0.99 | −0.5 | −1.5 |
Student’s t | 2.2E−03 | 0.39 | 0.19 |
F-test | 2.9E−02 | 0.43 | 0.42 |