MAJIS resolution is better than 100km. This corresponds to JUICE w.r.t Io surface < 666500km
For each time window identified above, compute the fraction of illuminated disk k using the formula:

k= (1+ cos (phase angle))/2)

If k<~0.6 the opportunity for hot spots monitoring is identified and a segment IO_MAJ_HOTSPOTS is scheduled for the whole duration when those conditions are met.
Whenever k>0.6 and if Io is in eclipse by Jupiter or by any other Galilean moon then the corresponding time in eclipse should also be a segment IO_MAJ_HOTSPOTS.