Requirements on orbitography for space clock missions

In this paper, we study in detail the requirements on orbitography compatible with operation of next generation space clocks at the required uncertainty, and based on a completely relativistic model. We show that the required accuracy goal can be reached with relatively modest constraints on the orbitography of the space clock, much less stringent than expected from "naive" estimates using the example of the ACES mission. Our results are generic to all space clocks and represent a significant step towards the generalised use of next generation space clocks in fundamental physics, geodesy, and time/frequency metrology.