Sub-Millimetre Wave Instrument

The SWI contains unique Swedish technology for high frequency receivers developed and designed by Omnisys. The instrument will be an integral part on board the Jupiter Icy Moon Explorer, JUICE, a planned European Space Agency spacecraft intended to explore and document the Jovian system.

The main aim of the JUICE mission is to further our understanding and knowledge of the chemistry, meteorology and structure of the middle atmosphere of Jupiter and to explore the habitable zones of its orbiting moons Ganymede, Europa and Callisto. Max Planck Institute for Solar System Research has engineered the Submillimetre Wave Instrument which will be activated during the mission and Omnisys supplies the sensitive high-frequency mixers and the powerful spectrometer backend. The passively cooled Front-End receiver unit developed by Omnisys is based on GaAs Schottky membrane mixer and cryogenic InP HEMT MMIC technology from Chalmers University of Technology.


  • The spacecraft will be equipped with an spectrometer using two high frequency receivers, working in 1080–1275 GHz and 530–601 GHz with a spectral resolving power of ~107. Omnisys is selected by the instrument consortium to supply the 600 GHz channel as well as the onboard spectrometers.
  • The Submillimetre Wave Instrument, or SWI, is a spectrometer/radiometer instrument operating in two submillimetre channels around 250 and 530 μm. The SWI measures spectra and continuum emissions in two bands between 530 – 601 GHz.


  • The Jupiter Icy Moons Explorer is a mission chosen in the framework of the Cosmic Vision 2015-2025 program of the Science and Robotic Exploration Directorate of the European Space Agency.
  • The Submillimetre Wave Instrument, or SWI, will be used to study Jupiter’s stratosphere and troposphere as well as the exospheres and surfaces of its surrounding icy moons.
  • The launch of the mission is planned for 2022, with an estimated arrival time eight years after, in the year 2030. By 2033 the spacecraft should enter orbit around Ganymede, after completing various manoeuvres around Jupiter and the other moons in the Jovian System.