Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 44, issue 2
Articles | Volume 44, issue 2
https://doi.org/10.5194/angeo-44-1227-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-44-1227-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 44, issue 2
ANGEO Communicates
 | 
30 Oct 2026
ANGEO Communicates |  | 30 Oct 2026

Juice/SWI during the Lunar-Earth-Gravity-Assist (LEGA) – Part 4: Antenna pointing and beam characterisation

Raphael Moreno, Ladislav Rezac, Tomáš Formánek, Thibault Cavalié, Christopher Jarchow, Emmanuel Lellouch, Paul Hartogh, Axel Murk, Mikko Kotiranta, Alberto Carrasco Gallardo, Samuel Goodyear, Ali Schulz-Ravanbakhsh, Borys Dabrowski, Fabrice Herpin, Yasuko Kasai, Donal Murtagh, Michael Olberg, Miriam Rengel, Hideo Sagawa, Slawomira Szutowicz, and Eva Wirström

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Latest update: 30 Oct 2026
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Short summary
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.
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The first-ever lunar–Earth flyby: a unique test environment...