GR translation: long taper

[Mike Jing]

V642.35-41, P655.27-33   Did you know that, son? Hard to believe, isn’t it?
Rather a long taper if you don’t mind, and just short of combable on top.
Yes, Private, the colors change, and how! The question is, are they
changing according to something? Is the sun’s everyday spectrum being
modulated? Not at random, but systematically, by this unknown debris in the
prevailing winds? Is there information for us? Deep questions, and
disturbing ones.

What does "long taper" mean here? I have searched and found out what
"taper" means regarding haircuts, but I'm not sure what "long taper"
entails.