Table 4 Uncertainties for Z component
From: Uncertainty in hourly mean data from classical magnetometers
Variable | Value of the variable | Uncertainty \( (\delta ) \) of the variable | Term | Uncertainty term |
|---|---|---|---|---|
ZC + ZS (nT) | 36,782 | 1 | \( \left( {\delta Z_{C} } \right)^{2} + \left( {\delta Z_{S} } \right)^{2} \) | 1 |
ZT (nT) | 199 | 1 | \( \left( {\delta Z_{T} } \right)^{2} \) | 1 |
\( \propto \) (nT/ °C) | 8.3 | 0.1 | \( \left( {t \delta \propto } \right)^{2} \) | 3.3124 |
t (°C) | 18.2 | 0.1 | \( \left( { \propto \delta t} \right)^{2} \) | 0.6889 |
SZ (nT/mm) | 8.7 | 0.1 | \( \left( {\left( {n_{Zm} - n_{{Z{\text{abs}}}} } \right)\delta S_{Z} } \right)^{2} \) | 0.052441 |
nZabs (mm) | 12.1 | 0.1 | \( \left( {S_{Z} \delta n_{Zm} } \right)^{2} \) | 0.7569 |
nZm (mm) | 14.39 | 0.12 | \( \left( {S_{Z} \delta n_{{Z{\text{abs}}}} } \right)^{2} \) | 1.089936 |
Total uncertainty Zm (nT) | 2.8 |