Part 1 Analysis of the earth satellite orbits for geodesy and geodynamics: precise GPS orbits for geodesy, O.L. Columbo; orbit and geodetic parameter estimations from global GPS data, Reigber et al; tracking strategies for laser ranging to multiple satellite targets, J.W. Robbins et al; satellite orbit calculations using geopotential coefficients up to high degree and order, E. Wnuk and T. Jopek. Part 2 Surface force effects in orbit and position determination: non-gravitational disturbing forces, R. Vilhena de Moraes; analytical treatment of air drag and earth oblateness effects upon an artificial satellite, F. Delhaise; direct and indirect solar radiation effects acting on LAGEOS satellite - some refinements, P. Inversi and F. Vespe; modelling the atmospheric perturbations in the debris problem, J. Ashenberg and R.A. Broucke. Part 3 Latest developments in orbital determination: a comparison between classical cross-over techniques and a stochastic-deterministic approach, L. Fenoglio et al; ERS-1 orbit determination at D-PAF, Reigber et al; ERS-1 orbits - the routine operation and high precision products, J.M. Dow et al; dynamic gravity probe-B spacecraft due to gravity jitter induced cryogenic helium disturbances in rotating dewar, R.J. Hung et al; an efficient method to compute the perturbation spectrum in linear satellite theory, S. Casotto. Part 4 Satellite and probe mission design in view of imposed scientific requirements: trajectory design for small probes to near-earth asteroids, A. Rossi et al.