Residual statistics of the CGGM parent model



N

Mean (nT)

RMS (nT)

F_{P}

30246

− 0.02

6.20

F_{NP} + B_{B}

184689

+ 0.29

2.60

F + B_{B}

214935

+ 0.26

3.16

B_{B}

122867

+ 0.47

2.67

\({B}_{r}\)

122867

+ 0.06

8.08

\({B}_{\theta }\)

122867

− 0.70

4.84

\({B}_{\varphi }\)

122867

+ 0.05

5.57

 For each type of data, N is the number of data used, while Mean and RMS are the Huberweighted misfit mean and RootMeanSquare values (in nT); F_{P} refers to the misfit of the scalar data above (absolute) QD latitude 55° (polar latitudes), F_{NP} to the misfit of the scalar data below (absolute) QD latitude 55° (nonpolar latitudes), F to the misfit of all scalar data, B_{B} to the misfit of the field component projected along the field direction (providing a measure of the misfit of the modulus of the vector data with respect to model prediction), and \({\mathrm{B}}_{\mathrm{r}}\),\( {\mathrm{B}}_{\uptheta }\), and \({\mathrm{B}}_{{\upvarphi }}\) refer to the three geocentric vector field components. Note that vector residuals provided here are reconstructed residuals propagated from the vector residuals minimized in the reference frame of the instrument. Recall that vector data are only used for (absolute) QD latitude below 20°