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Earth, Planets and Space

Table 1 Geomagnetic field models and the highest degrees used in assimilation

From: Geomagnetic secular variation forecast using the NASA GEMS ensemble Kalman filter: A candidate SV model for IGRF-13

Observations

Period

\(L_{obs}\)

gufm1:

1590–1960

4

CM4:

1960-2000

8

CM6:

2000-2019

13

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