JUNO spacecraft instruments


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he spacecraft’s main body measures 4.5 meters tall, and 3.5 meters in diameter. It is powered by three solar arrays leading to Juno’s total span of  about 20 meters. Juno’s liftoff mass was 3,625 kilograms, including about 200 kilograms for a titanium vault protecting sensitive electronics from Jupiter’s heavy radiation environment. Juno carries a payload of 29 sensors, which feed data to nine onboard instruments. Eight of these instruments (MAG, MWR, Gravity Science, Waves, JEDI, JADE, UVS, JIRAM) are considered the science payload. One instrument, JunoCam, is aboard to generate images for education and public outreach. Juno is a spin-stabilized spacecraft: it is spinning around its main axis at a rate of two rotations per minute. We are mainly interested in two remote sensing instruments: UVS and JIRAM.

junospacecraft instrument

Ultraviolet Imaging Spectrograph (UVS)

The UVS SwRI famillyThe Ultraviolet Imaging Spectrograph is taking spectrally resolved movies of Jupiter's powerful auroral emissions. UVS helps us understand the relationship between the auroras, the streaming particles that create them, the volcanic activity of Jupiter’s moons and the magnetosphere as a whole. Juno-UVS is a member of a familly of ultraviolet detectors developped by Southwest Research Institute (SwRI, Texas). Other versions are present on Rosetta, New Horizons and Lunar Reconnaissance Orbiter. New versions are currently developped for the ESA-JUICE mission and the NASA Europa-mission.

Jovian Infrared Auroral Mapper (JIRAM)

JIRAMThe Jovian Infrared Auroral Mapper studies Jupiter's atmosphere in and around the auroral regions, helping us learn more about the interactions between Jupiter’s upper atmosphere and the magnetosphere. JIRAM is also able to probe the atmosphere down to 50 to 70 kilometers below the cloud tops. JIRAM is provided by the Institute for Space Astrophysics and Planetology of the Italian INAF.

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