Figure 3 : Observed particle flux disturbance due to Ganymede.
Left top panel illustrates the geometry during event #2, during which
Juno’s equatorial crossing point crosses Ganymede’s; magnetic field
lines (red) intersecting the Juno trajectory (dashed black) and magnetic
equator (blue). The top right panel shows Juno’s trajectory in magnetic
equatorial coordinates color coded with the intensity of radiation
observed by the µASC. Bottom 3 panels show satellite and spacecraft
equatorial crossing distance, S3 longitude, and µASC observations as a
function of time (blue and red, averaged). Ganymede interaction events
1, 2, and 3 indicated.
µASC observations displayed in the bottom plot of figure 3 show clear
signatures of Ganymede’s interaction with the charged particle
environment. However, the signatures of the highly energetic particles
that µASC is sensitive to (>20 MeV) are only observed when
Ganymede and Juno have small phase separation.