Bridging the gap between the deep Earth and lithospheric gravity field

Barend Cornelis Root, Delft University of Technology, Delft, Netherlands, Joerg Ebbing, University of Kiel, Kiel, Germany, Zdenek Martinec, Dublin Institute for Advanced Studies, School of Cosmic Physics, Dublin, Ireland and Wouter van der Wal, Delft University of Technology, Faculty of Aerospace Engineering, Delft, Netherlands