Table 2. Mean (μ) and standard deviation (σ) of the differences in the X, Y and Z hourly mean values (QD—definitive) at five IMOs for 2011.
From: A method for the near real-time production of quasi-definitive magnetic observatory data
| Â | X (North) | Y (East) | Z (Vertical) | |||
|---|---|---|---|---|---|---|
|  | ζ (nT) | σ (nT) | ζ (nT) | σ (nT) | ζ (nT) | ˃ (nT) |
LER | −0.4 | 1.7 | −0.1 | 0.6 | 0.2 | 0.6 |
ESK | 0.3 | 0.9 | −0.3 | 0.7 | −0.1 | 0.6 |
HAD | −0.2 | 0.9 | 0.2 | 0.6 | 0.2 | 0.6 |
ASC | 0.9 | 2.1 | 1.4 | 3.7 | 0.4 | 1.5 |
PST | 0.8 | 2.0 | −1.1 | 1.8 | 1.0 | 2.0 |