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Table 2

Improvements in the final errors obtained with central instants, using two different observations sets.

Parameters Improvement formal errors Ratio

2020–2029 [1] 2026–2027 [2] [2]/[1]
Position radial 21.9 % 45.2 % 2.1
Io normal 17.4 % 26.7 % 1.5
axial 12.0 % 29.5 % 2.5

Velocity radial 17.3 % 26.5 % 1.5
Io normal 22.3 % 46.3 % 2.1
axial 2.9 % 25.1 % 8.6

Position radial 19.7 % 59.8 % 3.0
Europa normal 20.4 % 27.8 % 1.4
axial 11.0 % 2.5 % 0.2

Velocity radial 22.1 % 29.3 % 1.3
Europa normal 19.7 % 59.7 % 3.0
axial 4.2 % 33.6 % 7.8

Notes. The improvement in formal errors obtained with central instants is computed with respect to formal errors resulting from alternative observables, in two different cases. First, all mutual approximations simulated over the whole 2020–2029 period are included (referred to as case [1] in the table). Second, only mutual approximations occurring during the 2026–2027 period are selected (referred to as [2]).

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