Fig. 6

Relative percentage difference of the required precision as a function of the number n of orbital periods during which observations are taken. The variation of the required precision is expressed relatively to the nominal case obtained with \(n = 10\). The number of periods defines the mission duration as \(t_{m} = n T_{\text{orb}}\), which is used in the ASD conversion factor \(\sqrt{t_m/2}\) that is equal for every observables