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Table 4 Uncertainties for Z component

From: Uncertainty in hourly mean data from classical magnetometers

VariableValue of the variableUncertainty \( (\delta ) \) of the variableTermUncertainty term
ZC + ZS (nT)36,7821\( \left( {\delta Z_{C} } \right)^{2} + \left( {\delta Z_{S} } \right)^{2} \)1
ZT (nT)1991\( \left( {\delta Z_{T} } \right)^{2} \)1
\( \propto \) (nT/ °C)8.30.1\( \left( {t \delta \propto } \right)^{2} \)3.3124
t (°C)18.20.1\( \left( { \propto \delta t} \right)^{2} \)0.6889
SZ (nT/mm)8.70.1\( \left( {\left( {n_{Zm} - n_{{Z{\text{abs}}}} } \right)\delta S_{Z} } \right)^{2} \)0.052441
nZabs (mm)12.10.1\( \left( {S_{Z} \delta n_{Zm} } \right)^{2} \)0.7569
nZm (mm)14.390.12\( \left( {S_{Z} \delta n_{{Z{\text{abs}}}} } \right)^{2} \)1.089936
   Total uncertainty Zm (nT)2.8
  1. Dominant term is emphasized in italics