Living Planet   


Validation Concepts for Gravity Field Models from New Satellite Missions

Dr. Thomas Gruber(1)

(1) Technical University Munich, Arcisstrasse 21, 80290 München, Germany


The new satellite missions CHAMP, GRACE and GOCE will provide drastically improved global gravity field information in terms of quality and spatial resolution. In order to quantify independently from the estimation procedure the quality of these gravity field models, new concepts for validation using external information are necessary. Validation requires the processing of selected level 3 products, which further-on can be compared to independent solutions. A typical example for such an approach is the determination of the stationary sea surface topography using the geometric approach (mean sea surface minus the geoid) and comparison to oceanographic derived solutions. The paper summarises procedures for validation of gravity field models on different data levels and provides samples of validation results for the latest CHAMP and GRACE fields. Further-on an outlook to the requirements for validating GOCE gravity field models will be given.


Full paper

Workshop poster

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry