Climatological models of non-polar geomagnetic daily variations using the DIFI methodology with Swarm and CHAMP satellite dataArnaud Chulliat, Louis Chauvet, Gauthier Hulot, Robin Duchêne and Martin FillionJ. Space Weather Space Clim., 15 (2025) 46DOI: https://doi.org/10.1051/swsc/2025041