On the contribution of PRIDE-JUICE to Jovian system ephemerides
Dominic Dirkx, Leonid I. Gurvits, Valery Lainey, Giacomo Lari, Andrea, Milani, Giuseppe Cim\`o, Tatiana Bocanegra-Bahamon, Pieter Visser

TL;DR
This paper evaluates how PRIDE-JUICE radio and optical data will improve the accuracy of Jovian system ephemerides and physical parameters, emphasizing the importance of VLBI and Io astrometry for mission planning and scientific insights.
Contribution
It provides a quantitative analysis of PRIDE-JUICE observables' impact on Jovian system ephemerides and identifies key data types essential for mission success.
Findings
VLBI data constrains Ganymede and Callisto dynamics perpendicular to their orbits.
VLBI data reduces dependence on JUICE orbit determination accuracy.
Optical astrometry of Io is crucial for stabilizing ephemeris solutions.
Abstract
The JUICE mission will perform detailed measurements of the properties of the Galilean moons, with a nominal in-system science-mission duration of about 3.5 years. Using both the radio tracking data, and (Earth- and JUICE-based) optical astrometry, the dynamics of the Galilean moons will be measured to unprecedented accuracy. This will provide crucial input to the determination of the ephemerides and physical properties of the system, most notably the dissipation in Io and Jupiter. The data from Planetary Radio Interferometry and Doppler Experiment (PRIDE) will provide the lateral position of the spacecraft in the ICRF. In this article, we analyze the relative quantitative influence of the JUICE-PRIDE observables to the determination of the ephemerides of the Jovian system and the associated physical parameters. We perform a covariance analysis for a broad range of mission and…
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