Spatial correlation structure of the ionosphere predicted by geomagnetic indices and application to global field modelling

Matthias Holschneider1, Khadidja Ferrat1, Vincent Lesur2 and Claudia Stolle3, (1)University of Potsdam, Institute of Mathematics, Potsdam, Germany, (2)Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS/INSU, Paris, France, (3)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany