co-chairs:         P. Visser (Pieter.Visser@lr.tudelft.nl)
                   R. Haagmans (Roger.Haagmans@esa.int)

The current generation of gravity missions provides, besides fantastic new results, also opportunities for comparison of classical and new approaches. Recent results from CHAMP and GRACE indicate big steps forward in quality of modeling the static and dynamic gravity field. GOCE promises even to provide models with a better spatial resolution. Comparison and possibly combination of missions during periods of overlap may even provide better results than those of a single satellite mission. Data processing techniques, "aliasing" problems and the link to ground based data play an important role in optimally exploiting the data from these missions. Today's experiences translate into requirements for future satellite missions that are even more challenging than those of the existing missions. This session solicits papers in the above broad scope. Also the link with the analysis of long records of LASER ranging (etc.) results and ground-based data (e.g. GGP) is encouraged.