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Survey of ions observed in situ in the topside, equatorial Jovian ionosphere

Presentation #309.07 in the session Giant Planet Magnetospheres, Ionospheres and Aurorae (Oral Presentation)

Published onOct 23, 2023
Survey of ions observed in situ in the topside, equatorial Jovian ionosphere

During its perijove passes, the Juno spacecraft reaches altitudes down to 3500 km and velocities of 58 km/s, which permits regular observation of cold ions of the topside Jovian ionsosphere. These cold ions are measured by the Jovian Auroral Distributions Experiment Ion (JADE-I) sensor. JADE-I measures ion composition over a mass range of 1 to 64 amu / q, and the high spacecraft velocity - with an equivalent ram energy of ~18 eV / amu - enables observations of low energy ions (< 1 eV / q). In the equatorial ionosphere, JADE-I observes cold ions (T < 1 eV) comprising primarily of protons, but also light (amu / q ≤ 5) and heavy ions (amu / q ≥ 5). Here we will present a survey of the cold ions observed in the topside ionosphere of Jupiter.

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