I've literally just heard here that the days of observing Iridium satellite flares are numbered. Of course it's common sense, but I never thought about it.
Roughly how soon are these going to start diminishing in frequency? In five years they'll be half as often? Or much sooner? Later?
Will the ramp-down be uniform over the globe, or is there a chance that it could be noticeable at some latitudes sooner than at others?