The Submillimetre Wave Instrument (SWI) onboard the Jupiter Icy Moons Explorer (Juice) spacecraft consists of a 29 cm antenna and two radio receivers operating at submillimeter wavelength. This instrument is designed to study Jupiter's atmosphere and the thin atmospheres of its moons.

We used Earth observations  obtained during the Lunar-Earth-Gravity-Assist (LEGA) . This data analysis allows us to characterise the antenna beam and pointing corrections.

When the JUICE spacecraft swung past the Moon and Earth in August 2024, a network of radio telescopes tracked its signal with extraordinary precision. By measuring shifts in the spacecraft's radio frequency, scientists could reconstruct its exact trajectory, probe the ionosphere, and monitor space weather. This study demonstrates that ground-based radio astronomy infrastructure can play a powerful role in supporting deep-space exploration, laying the groundwork for JUICE's arrival at Jupiter.

We discuss the history of quasiperiodic ~27-day recurrent geomagnetic activity and the origin of the names "interaction region", "corotating interaction region" and "stream interaction region". The latter three names have an identical meaning. We recommend the most commonly used name "corotating interaction region" or CIR for sole usage in the literature to avoid confusion.