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Table 2 LSLE-GN convergence for CIY4, where \(\left| {\varvec{\Delta x}_k}\right|\) is the \(\ell _2\) norm of the adjustment vector \(\varvec{\Delta x}_k\) in Eq. 8 and “M/I” denotes magnetospheric/induced parameters

From: A comprehensive model of Earth’s magnetic field determined from 4 years of Swarm satellite observations

Iteration k \(\left| {\varvec{\Delta x}_k}\right| _2\) excluding M/I \(\left| {\varvec{\Delta x}_k}\right| _2\)
0 4348.027 8351.771
1 135.642 3230.750
2 6.669 1556.125
3 1.997 642.987