Core field accelerations from Swarm and ground observatory data

Christopher C Finlay1, Nils Olsen2, Stavros Kotsiaros1, Nicolas Gillet3 and Lars Tøffner-clausen1, (1)DTU Space, Lyngby, Denmark, (2)Technical University of Denmark - Space, Kongens Lyngby, Denmark, (3)ISTerre Institute of Earth Sciences, Grenoble, France