Juno Records ‘Sounds’ of Jupiter’s Moon Ganymede planetaryscience space science
This image of Ganymede was obtained by the JunoCam imager aboard NASA’s Juno spacecraft during its June 7, 2021, flyby of the icy moon. This image is a preliminary product — Ganymede as seen through JunoCam’s green filter. Juno is a spin-stabilized spacecraft , and the JunoCam imager has a fixed field of view. To obtain Ganymede images as Juno rotated, the camera acquired a strip at a time as the target passed through its field of view.
Juno’s Waves instrument, which tunes in to electric and magnetic radio waves, collected the data on those emissions. Their frequency — which range from 10 to 50 kHz — was then shifted into the lower audio range. “The Waves instrument observed plasma waves associated with Ganymede’s magnetosphere, including whistler-mode hiss, electrostatic emissions between harmonics of the electron cyclotron frequency, a band at the upper hybrid frequency, and broadband bursty emissions associated with Ganymede’s magnetopause and wake.”
“Continuing bursty emissions were observed until the entry into a magnetospheric region hosting multiple electron cyclotron harmonic emissions.”
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