I'm surprised that is the first priority. It presumably targets Jupiter and Saturn: I thought the JWT was primarily for observing objects further afield.
Sure, there's a ton we don't know yet about Jupiter and Saturn...but for reference Juno cost 0.1x the amount of the JWT and observed Jupiter from one million times closer [0]. Is the JWT really the most economical way to make these observations?
Maybe they're starting with an easier goal and then work their way up from there? Maybe that allows the scientists to calibrate the instruments or whatever
I don't know the first thing about how any of this works, but that would be my first guess.
Principal Investigator: Leigh Fletcher
PI Institution: University of Leicester
Title: Extreme Events on Gas Giants: Impacts and Storm Eruptions
Allocation: 10.4 hours allocation change history
I bet those 10.4 hours are planned down to the millisecond.