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The JUICE (Jupiter Icy Moon Explorer) mission was adopted in autumn 2014, and its scientific instruments are currently in the development phase. The RPWI (Radio and Plasma Waves Instrument) consists of several receivers linked to electrical and magnetic sensors covering the low-frequency part of the spectrum (a few Hz to 45 MHz). The main scientific objectives are, on the one hand, to explore Jupiter's magnetosphere, the role of the Galilean satellites on its activity and its interaction with the solar wind; and on the other hand, to explore Ganymede, study its internal magnetic field and its interaction with Jupiter's magnetosphere.


The French laboratories involved in the RPWI instrument are LESIA, LPP, LPC2E, LATMOS and IRAP. French participation in the RPWI team is coordinated by its French co-PI, B. Cecconi, at LESIA. The SNO responsibilities of the various laboratories are as follows:

- LESIA is also responsible for the scientific coordination of JENRAGE (Jovian Environment Radio Astronomy and Ganyede Exploration), the low-frequency radio instrument designed in collaboration with Sweden and Japan. LESIA is providing the know-how and experience acquired on previous projects (in particular Cassini/RPWS and STEREO/Waves), for the design of the instrument. It is preparing the ground and in-flight calibration, as well as the instrumental operating modes, and is setting up the processing chain for data analysis, and preparing the archiving and distribution of the data obtained by this instrument.

- The LPP designs and builds a Search Coil 3D, a magnetic sensor for RPWI (Cassini/RPWS, BepiColombo/MMO/RPW heritage, in particular), prepares its calibration on the ground and in flight, sets up the data processing chain in collaboration with the Czech team building the associated receiver, and prepares the archiving and distribution of data from this sensor.

- LPC2E is designing and building the MIME (Mutual Impedance Measurements) experiment, inherited from the MIP experiment on the Rosetta mission. The team prepares the instrumental operating modes, calibrates the instrument, and performs the numerical modeling needed to interpret the measurements. It also prepares the archiving and distribution of data obtained by this instrument.

- LATMOS supports the entire RPWI team in modeling the space environment around Jupiter and Ganymede.

- IRAP, in particular through the CDPP, provides support for the archiving and distribution of data from the entire RPWI experiment. It also provides tools for preparing RPWI observations using models supplied by LATMOS.