November 27, 2019

RPWI « Radio & Plasma Waves Investigation »

The JUICE mission’s RPWI instrument (Radio & Plasma Wave Investigation) comprises a suite of highly integrated instruments designed to acquire a comprehensive set of measurements of plasma and electromagnetic fields. RPWI will study the electrodynamic influence of the Jovian magnetosphere on the exospheres, surfaces and oceans of Ganymede, Europa and Callisto.

RPWI will carry three types of sensor:

  • Four Langmuir Probes (LP-PWI) to measure Jupiter’s DC-AC electric field up to 1.6 MHz, and the electron density of cold plasmas
  • A three-axis Search Coil Magnetometer (SCM) to measure the vector magnetic field up to 20 kHz
  • A three-axis antenna (RWI) consisting of three electric dipoles to monitor radio emissions in the 80 kHz - 45 MHz range and receive active measurements from MIME (80 kHz-3 MHz)


The French contribution to the RPWI instrument consists of the supply by the LPP plasma physics laboratory of the MIME board for the SCM, processing chains from the IRAP astrophysics and planetology research institute, distribution and delivery of data to the ESA archive, and processing chains for the JENRAGE instrument from the LESIA space and astrophysics instrumentation research laboratory.