High-Resolution Grids of Gravitational Gradients from GOCE
Sebera, Josef1; Novak, Pavel1; Valko, Milos1; Sprlak, Michal1; Baur, Oliver2; Tsoulis, Dimitrios3; Martinec, Zdenek4; Sneeuw, Nico5; Vermeersen, Bert6; van der Wal, Wouter6; Bouman, Johannes7; Fuchs, Martin7; Haagmans, Roger8
1New Technologies for Information Society, Faculty of Applied Sciences, University of West Bohemia, CZECH REPUBLIC; 2Austrian Academy of Sciences, Space Research Institute, AUSTRIA; 3Aristotle University of Thessaloniki, Department of Geodesy and Surveying, GREECE; 4Dublin Institute for Advanced Studies, Geophysics Section, IRELAND; 5University of Stuttgart, Institute of Geodesy, GERMANY; 6echnical University Delft, Astrodynamics and Space Missions, NETHERLANDS; 7Deutsches Geodätisches Forschungsinstitut, GERMANY; 8European Space Agency, NETHERLANDS
Based on reprocessed GOCE gravitational gradients, that are spectrally filled in with a long-wavelength signal from GRACE/GOCE models, we provide global grids of gravitational gradients in the local north-oriented frame. These grids have the equiangular resolution of 30 arc-min that correspond to 360 in terms of spherical harmonic degree. The signal content of the data grids is analyzed with respect to that provided by state-of-the-art GRACE/GOCE Earth gravitational models. Grids of gravitational gradients reduced for effects of topographic, sea water, continental ice as well as sediments and crustal layers can be then used for geodetic and geophysical applications. These data products represent a particular output from the STSE GOCE+ Theme 2 project "Towards a better understanding of the Earth's interior and geophysical exploration research" funded by ESA.