Gruber, T.;Reigber, C.;Schwintzer, P.
The 1999 GFZ Pre-CHAMP High Resolution Gravity Model
IUGG XXII General Assembly
1999

Gruber, T.
CHAMP Small Satellite Mission: The First European Spaceborne GPS Surface Reflection Experiment
ESA Workshop on Meteorological and Oceanographic Application of GNSS Surface Reflections: From Modelling to User Requirements
1999