Can someone clarify what the likely concern at those frequencies is?
These would be beefed up modern versions of MODIS and similar sats. This defense source might be a small number of sats that provide "peace time" hurricane coverage by sitting in the one great circle polar orbit track that passes over Florida every time (no precession). The relative sun angle on the ground changes for the sat but microwaves don't care much.
(Note: that's some side brain off the cuff speculation about something else, typically met sats are in Sun-synchronous polar orbits that take a while to pass over the same point of interest again).
It's possible the DoD wants real time high grade weather reports, modelling and predictions under some other great circle track and has sats that can be repositioned.
That aside, there's a wealth of things that can be done with multiband data .. monitoring changes against a normalised base image can turn up all manner of things in a dynamic theatre, changes in croplands can indicate vehicle movements, new and covered over buildings, stuff.