Study of the Step mission (ex 98/S55) Programme Discovery Programme Reference 1999-11 Contractor MMS Start Date 1999 End Date 1999 Country France More Like This Possible “Multiplier effect” of ESA R&D budgets Applications and Implementations of atom-based Inertial Quantum Sensors New Design Methodologies and Techniques New Design Methodologies and Techniques fundamental issues in the aerothermodynamics of planetary-atmosphere (re)entry