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Table 4
Configurations of the simulated missions along with the adopted orbit-tracking setup.
| Item | Name | Detailed description |
|---|---|---|
| Force models | Saturnian gravitational field | As presented in Sect. 2 |
| N-body perturbation | Sun, planets, and Saturnian moons (Folkner et al. 2008, cf. DE421 ephemeris) | |
| Post-Newtonian effect | Sun and planets | |
| Coordinate system | Initial coordinate | Saturn-centered Earth mean-equator and equinox of 2000 frame from IAU (Archinal et al. 2018) |
| Saturn rotation model | Saturn orientation model from IAU (Archinal et al. 2018) | |
| Corrections | Tracking stations | Earth solid tide, ocean tide, and polar tide correction (Petit & Luzum 2010) |
| Earth troposphere | Hopfield model +CfA2.2 mapping function (Hopfield 1963; Davis et al. 1985) | |
| Speed of light | Relativistic effect (Moyer 2005) | |
| Others | TDB-TT translation model | Moyer (1981) |
| Ground tracking stations | Madrid, Goldstone, Canberra, Malargüe, and New Norcia (Iess et al. 2019) | |
| Cutoff angle | 15° (Iess et al. 2019) | |
| Noise level of observables | ± 0.02 mm s−1 at 30 s integration time for Doppler (Iess et al. 2019) | |
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