Göttingen 2025 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 1: Planets and Small Bodies I

EP 1.2: Vortrag

Montag, 31. März 2025, 17:15–17:30, ZHG005

First results of JUICE-SWI from the Lunar Earth Gravity Assist maneuver — •Paul Hartogh, Christopher Jarchow, Ladislav Rezac, and Miriam Rengel — Max-Planck-Institut für Sonnensystemforschung, Göttingen

The Submillimetre Wave Instrument (SWI) is part of JUICE (JUpiter ICy moons Explorer). JUICE is the first Large Class mission (L1) of the ESA's Cosmic Vision programme. SWI will investigate the stratosphere of Jupiter (general circulation, chemistry, isotopic composition) and the atmospheres and surfaces of the Galilean satellites (dynamic and kinetics, molecular and isotopic composition, composition of volcanic and potential cryovolcanic plumes) in the far infrared in two submillimeter wave bands (500 and 250 micrometers). In August 2024 the JUICE spacecraft passed Earth and Moon during the LEGA (Lunar Earth Gravity Assist). During the lunar gravity assist SWI observed the rotational ground states of water vapor (ortho- and para water) in nadir mode. During the Earth flyby, numerous observation modes were executed, observing the Earth atmosphere in nadir and limb modes. Of particular interest are the 250 micrometers results, because the Earth was observed for the first time from space with high resolution techniques in this range of the electromagnetic spectrum. This talk will present the first results of the LEGA data analysis and illustrate the power of submillimeter wave observations in investigating physical processes.

Keywords: JUICE; Jupiter system; Far Infrared; Submillimeter; Flyby