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Table 2 Statistics of the satellite and observatory data used to obtain the Mag.num model

From: The Mag.num core field model as a parent for IGRF-13, and the recent evolution of the South Atlantic Anomaly

Type Latitudes Coordinates N Mean (nT) rms (nT)
Satellite
 X LM SM 266258 0.023 2.936
 Y LM SM 266258 \(-\)0.045 3.091
 Z LM SM 266258 0.215 3.215
 X HL NEC 773163 \(-\)1.892 37.740
 Y HL NEC 773163 1.380 44.129
 Z HL NEC 773163 \(-\)0.727 14.084
Additional for Euler angle estimation
 X LM SM 226619 0.173 3.989
 Y LM SM 226619 \(-\)0.125 3.695
 Z LM SM 226619 \(-\)0.186 3.784
Observatories
 X LM SM 516072 0.184 3.634
 Y LM SM 516072 \(-\)0.136 3.737
 Z LM SM 516072 \(-\)0.038 5.107
 X HL NEC 114321 \(-\)0.541 10.432
 Y HL NEC 114321 0.220 9.098
 Z HL NEC 114321 \(-\)0.408 12.923
  1. N is the number of input data after data selection. The mean of the residuals and the rms misfit are given separately for the X, Y and Z field components. LM stands for low and mid latitudes, HL for high latitudes. SM stands for solar magnetic and NEC for geocentric North East Centre
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